IELTS Problem-Solution Essay Vocabulary: Diagnose and Respond Precisely

A prompt asks why household food waste is increasing and what can be done. A response says:

"The problem stems from consumers. Supermarkets exacerbate it. Governments should eradicate food waste with education because this is a feasible remedy."

The paragraph sounds decisive, but its vocabulary hides four unanswered questions. Which consumer behaviour is the source? What existing problem do supermarkets make worse? Would education control the behaviour or merely reduce some harm? What constraints make the proposal feasible?

IELTS Writing Task 2 may ask you to explain causes and present solutions to a problem. Official guidance emphasizes reading the prompt carefully, developing relevant ideas, and supporting them. A problem–solution essay therefore needs two separate kinds of strength:

1. diagnosis strength: how confidently can you identify the origin and worsening factors?
2. solution strength: does the measure control a source, reduce harm, correct a defect, or eliminate the problem?

This guide develops seven choices: stem from, underlying, exacerbate, curb, mitigate, remedy, and feasible.

A diagnosis-to-response map

The rows are connected, but not interchangeable. A measure can be feasible and ineffective. A remedy can address an underlying defect but create a new cost. A policy can curb a harmful activity yet only mitigate its consequences.

1. Stem from: keep the causal direction clear

X stems from Y means X originates in Y.

"Household waste may stem partly from confusing date labels."

The waste is the outcome; confusing labels are the proposed source. This is the reverse grammatical order of confusing labels lead to waste.

Use the active pattern stem/stems/stemmed from + noun phrase or -ing form. Do not write waste is stemmed from. The phrase can introduce positive outcomes too, so negativity is not part of its meaning.

Most essay diagnoses are not laboratory conclusions. Calibrate them:

• may stem from... marks uncertainty;
• stems partly from... leaves room for other causes;
• stems from a combination of X and Y explicitly names multiplicity.

An unqualified sentence can sound like a settled diagnosis. Vocabulary does not supply evidence, so avoid claiming a sole cause merely because stem from sounds analytical.

2. Underlying: distinguish the cause from the visible symptom

Underlying points to a more basic layer beneath the visible one: a cause beneath a symptom, an assumption beneath a forecast, or a trend beneath noisy figures.

"Large portions are a visible source of waste, but the underlying problem is a pricing system that rewards buying more than a household needs."

Natural collocations include underlying cause, issue, assumption, trend, and condition. Use the adjective before a noun. Do not write the problem is underlying to waste or governments must fix the underlying without a noun.

The word does not mean hidden deliberately, the only cause, or a cause proved beyond doubt. It asks the reader to look below the surface. If your evidence supports only a possibility, write one possible underlying cause.

3. Exacerbate: make an existing problem worse

Exacerbate is a formal transitive verb meaning make an existing negative condition worse.

"Multi-buy discounts can exacerbate over-purchasing among small households."

The object must be a problem or harmful condition: exacerbate inequality, pressure, a shortage, uncertainty, or waste. The factor need not intend the harm. If the causal claim is projected or uncertain, use may or could.

Keep three neighboring claims separate:

• cause can create a problem;
• exacerbate worsens a problem that already exists or is developing;
• compound foregrounds an additional problem joining the first.

Do not use exacerbate intransitively when you mean worsen: not the situation exacerbated. Write the discount exacerbated the situation or the situation worsened.

4. Curb: restrain the source or trend

Curb + direct object means bring an unwanted activity, cost, trend, or behaviour under control.

"Clearer labels could curb unnecessary disposal of safe food."

The word frames its object as harmful or excessive. It does not mean eliminate. A campaign intended to curb waste states a purpose; it does not prove waste fell.

Reduce reports a neutral decrease. Restrict focuses on a rule limiting amount, range, access, or permission. Curb focuses on controlling the undesirable behaviour or trend. The verb takes no down: write curb waste, not curb down waste. The noun frame is a curb on wasteful purchasing.

Use curb when the intervention acts on the source activity. If it only softens damage after the activity occurs, mitigate may be more accurate.

5. Mitigate: reduce harm without pretending to solve it

Mitigate takes a negative object such as risk, harm, impact, loss, pressure, or consequences. It means reduce severity, likelihood, or downstream effects without necessarily removing the underlying problem.

"Donating surplus food can mitigate the social and environmental impact of over-ordering, but it does not prevent the surplus from being created."

That boundary is central. A redistribution scheme can mitigate consequences while the purchasing system remains unchanged. A temperature-controlled shelf may mitigate spoilage risk. Neither automatically remedies the cause.

Use a direct object: mitigate the impact, not the discouraged default mitigate against the impact. Avoid neutral or positive objects such as mitigate growth. And name what remains when it matters; the risk was mitigated does not mean it disappeared.

6. Remedy: a corrective measure, not a guaranteed cure

As a noun, a remedy is a measure intended or used to correct, improve, or deal with a problem. The frame is a remedy for + problem.

"Standardized date labels are a plausible remedy for consumer confusion."

As a formal verb, it takes a direct object: remedy a defect, gap, imbalance, or shortcoming.

"The proposal would remedy the inconsistency between retailers’ labels."

A proposed remedy does not entail success. Address may mean begin dealing with a problem without correcting it. Cure often makes the stronger claim that a disease or problem is eliminated. In problem–solution writing, remedy is useful when the measure targets something wrong or deficient, but you still need to explain its mechanism and expected reach.

7. Feasible: doable under named constraints

A plan is feasible when it can actually be carried out under the relevant constraints.

"A single national labeling standard is feasible within the existing inspection system, although implementation would still require retailer training."

Useful frames include feasible within the budget/time available and a feasible option/approach. The word does not mean profitable, popular, approved, effective, sustainable, or certain to happen.

Possible includes theoretical possibilities. Practical often evaluates suitability or sense in real conditions. Viable overlaps strongly with feasible and often suggests an option capable of working successfully or surviving over time; do not invent an absolute divide between them.

To earn feasible, name at least one constraint: cost, time, authority, infrastructure, staff, enforcement, or scale.

Worked problem–solution analysis

Prompt: Many households throw away edible food. Why does this happen, and what measures could reduce the problem?

"Household food waste stems from several sources, but confusing date labels are one important factor. Consumers often treat a quality label as a safety deadline, while large package sizes exacerbate over-purchasing. The underlying problem is therefore not simply carelessness; in many shops, the information and price incentives both encourage households to buy or discard too much. A standardized labeling system could curb premature disposal by distinguishing safety dates from quality dates. Smaller default package sizes could also mitigate the financial and environmental impact of unused food, although they would not prevent every purchase error. These measures are feasible only if retailers can change packaging without imposing disproportionate costs on small suppliers. They should be treated as proposed remedies, not as a promise to eradicate food waste."

The paragraph separates its claims:

• stems from several sources avoids a sole-cause claim;
• exacerbate identifies a factor that worsens existing over-purchasing;
• underlying looks beneath the moral label carelessness;
• curb targets the disposal behaviour;
• mitigate claims partial reduction in harm;
• feasible only if states a real implementation constraint;
• proposed remedies keeps effectiveness open.

Why eradicate is usually too strong

Eradicate means remove something completely. It is appropriate only when the essay can defend complete elimination. Most social, environmental, and behavioural measures have partial reach, imperfect compliance, or effects that take time.

Replace the blanket promise with the actual mechanism:

• curb excessive demand — restrain a harmful activity;
• mitigate the impact — reduce harm;
• remedy a labeling defect — correct a specific deficiency;
• reduce waste by a measurable amount — report a neutral decrease.

The more precise verb may sound less dramatic. It makes the proposal more credible because the sentence states what the intervention can and cannot do.

Common problem–solution mistakes

• One cause presented as the cause: use qualification when several origins are plausible.
• Reversed stem-from logic: in X stems from Y, Y is the source.
• Underlying without a noun: write underlying cause/problem, not fix the underlying.
• Exacerbate used for creation: identify the existing negative condition being worsened.
• Curb down: curb already takes its object directly.
• Mitigate equals solve: state residual risk or impact where relevant.
• Remedy equals guaranteed success: proposed and possible keep the evaluation open.
• Feasible equals good: feasibility tests execution, not desirability or efficacy.
• Solution-list paragraphs: explain which cause, behaviour, or consequence each measure targets.

Quick check

1. Which sentence correctly traces outcome to source?

A. "Unreliable transport may stem from poor attendance" when transport is the stated cause. B. "Poor attendance may stem from unreliable transport." C. "Poor attendance is stemmed from unreliable transport."

2. The visible symptom is empty buses; the deeper issue is a route network that misses residential areas. Which phrase fits the deeper issue?

A. the obvious cure B. the eradicated risk C. the underlying problem

3. Congestion already exists, and a new shopping complex makes it worse. The complex:

A. mitigates congestion B. exacerbates congestion C. is exacerbated congestion

4. A policy restrains a rising harmful activity but does not eliminate it. It:

A. eradicates the activity B. remedies against the activity C. curbs the activity

5. A barrier reduces flood damage but does not stop flooding. It:

A. proves the risk is gone B. mitigates the damage C. remedies the river

6. Which fact directly supports calling a plan feasible?

A. It sounds ambitious. B. It can be delivered with the available budget, staff, and legal authority. C. Everyone agrees it will eradicate the problem.

Answers: 1-B, 2-C, 3-B, 4-C, 5-B, 6-B. The causal direction is outcome-from-source. Underlying names the deeper layer. Exacerbate worsens an existing problem. Curb restrains without promising elimination. Mitigate allows harm to remain. Feasible requires practical constraints.

Fresh practice item

Prompt: In many cities, rental housing has become unaffordable. What factors contribute to this problem, and what measures could be taken?

Write a seven-sentence plan before drafting the essay:

1. one visible symptom;
2. one possible underlying cause;
3. one sentence using stem from with correct causal direction and a qualifier;
4. one factor that may exacerbate the existing problem;
5. one measure to curb a harmful activity;
6. one different measure to mitigate harm for affected renters;
7. one feasible remedy with a named budget, authority, time, or enforcement constraint.

Check that no measure promises to eradicate unaffordability. Then ask whether each solution targets a cause, a worsening factor, or a consequence. If you cannot answer, the vocabulary is hiding a gap in the reasoning.

If you want to practise matching solution strength to the problem a sentence actually identifies, try Lyra Practice.

Sources

• IELTS Academic Writing test format — IELTS
• How to understand IELTS Writing Task 2 question prompts — IELTS
• IELTS Writing band descriptors — IELTS

Related

• IELTS Vocabulary Practice
• Exam English Vocabulary Practice
• IELTS Writing Task 2 Vocabulary by Essay Type
• IELTS Vocabulary for Cause and Effect
• IELTS Vocabulary for Environment
• IELTS Collocations for Speaking and Writing

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