To exacerbate something is to make it worse. Not just worse in a vague sense, but more intense, more severe, or harder to manage than it was before. The word turns up constantly in medical reports, political commentary, and formal writing, and knowing exactly how it works will stop you from reaching for a clumsy substitute.
What exacerbate means
Exacerbate is a transitive verb. It takes a direct object: you exacerbate a problem, a condition, a conflict, or a situation. The thing being exacerbated already exists and is already negative. You can't exacerbate a good outcome. The word belongs entirely to contexts where something is going wrong and then goes further wrong.
The core definition: to make something that is already bad or difficult worse in degree or severity.
A doctor might write that cold weather exacerbates a patient's asthma. A journalist might report that the policy exacerbated inequality. A project manager might note that poor communication exacerbated an already-strained timeline. In each case, a pre-existing negative condition grows more serious because of an external factor.
Pronunciation
Exacerbate is pronounced ig-ZAS-er-bayt. Four syllables. The stress falls on the second: ZAS. The noun form is exacerbation (ig-ZAS-er-BAY-shun), which adds a fifth syllable and shifts the stress slightly later in the word.
Origins of the word
Exacerbate comes from the Latin exacerbare, built from the prefix ex- (intensifying the meaning) and acerbus, meaning harsh, bitter, or sharp. That root idea of bitterness sharpening into something worse still sits inside the modern word. English adopted it in the 17th century, and it has stayed in formal register ever since.
How to use exacerbate in a sentence
The construction is simple: subject + exacerbate + object. The subject is whatever makes things worse. The object is the thing that gets worse.
- Stress can exacerbate skin conditions like eczema and psoriasis.
- The delays exacerbated tensions between the two departments.
- Cutting the budget now would only exacerbate the problem.
Notice that none of those objects are neutral or positive. Exacerbate doesn't work on good things. You'd never say "the warm weather exacerbated her happiness." The word requires a wound to dig into.
Exacerbate vs other similar words
Writers sometimes swap exacerbate for aggravate, worsen, or compound. All four overlap, but they're not identical.
Worsen is the plainest synonym and fits any register. Use it when you want clarity over formality. Aggravate works similarly, though it also carries an informal meaning of irritating someone, which can create ambiguity. Compound often implies adding to a problem by layering additional factors on top. Exacerbate focuses specifically on intensifying something already present, and it carries a clinical, precise flavour that the others don't quite match.
If you write about health, law, economics, or policy, exacerbate is usually the sharper choice. In casual writing, worsen or make worse will usually read more naturally.
Common mistakes with exacerbate
The most frequent error is using exacerbate with a neutral or positive object. "The treatment exacerbated her recovery" doesn't work, because recovery isn't a negative condition. The correct construction would be "the treatment exacerbated her symptoms" or "the delay exacerbated her recovery time."
Writers also sometimes confuse exacerbate with exasperate. These are different words. Exasperate means to irritate someone intensely, to push a person to the edge of their patience. Exacerbate means to worsen a situation or condition. A noise complaint might exasperate a neighbour. A broken boiler might exacerbate a tenant's already-difficult living conditions. One targets feelings; the other targets situations.
Precision matters here in the same way it does with words like obstinate, where a close synonym exists but the connotations diverge enough to change what you're actually saying.
Exacerbate in formal and professional writing
Exacerbate earns its keep in professional contexts. Medical writing uses it constantly: chronic stress exacerbates cardiovascular disease; alcohol exacerbates liver inflammation. Legal documents use it to describe how one party's actions worsened an existing harm. Economic analysis relies on it to show how one factor compounds another.
In these settings, exacerbate signals that the writer understands cause and effect clearly. It names a relationship, not just a coincidence. That precision is exactly what the word was built for.
It's worth comparing this to conducive, a word that also describes a causal relationship between conditions. Conducive points toward outcomes that help something happen; exacerbate points toward outcomes that make something worse. Both words do the same structural job, just in opposite directions.
Quick reference
Part of speech: verb (transitive)
Pronunciation: ig-ZAS-er-bayt
Noun form: exacerbation
Meaning: to make something bad worse in degree or severity
Use with: negative conditions, problems, conflicts, symptoms, tensions
Do not use with: neutral or positive outcomes
If the sentence describes a bad situation getting worse because of an identifiable cause, exacerbate is almost certainly the right word. It's direct, precise, and carries real authority in formal prose. The simplest test: replace it with "make worse." If that works, so does exacerbate.