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"Adverse" = harmful external conditions; "averse" = personal reluctance or strong dislike.
Side-by-side comparison
Harmful, unfavorable, or opposing. Used to describe external conditions, effects, or circumstances that are negative or harmful.
The expedition was called off due to adverse weather conditions in the mountains.
The medication may have adverse effects on the liver in some patients.
The company managed to grow despite the adverse economic climate.
Having a strong dislike or reluctance toward something. Used to describe a person's attitude or feeling. Always followed by "to".
She is not averse to taking risks when the potential reward is high enough.
He was deeply averse to any form of confrontation and avoided conflict at all costs.
I am not averse to the idea, it just needs more thought.
Common mistake
- •Saying "adverse to risk" is the most common mistake: the adjective that pairs with "to" to describe a personal attitude is "averse".
- •"Adverse" describes negative external conditions or effects, not feelings.
Trick to remember it
- •"Averse" always comes before "to" and describes what someone feels or prefers to avoid.
- •"Adverse" describes something external that harms, like adverse effects or adverse conditions.
Quick rule
- •"Adverse" = external and harmful (conditions, side effects).
- •"Averse" = personal feeling of dislike, always followed by "to".
Did you know?
"Risk averse" is a key technical term in behavioral economics: a risk averse person prefers a certain outcome over a gamble with the same expected value. Here "averse" is mandatory: "risk adverse" is simply not the right expression and any economist would spot it immediately.
Practise what you learned
Exercise 1 · Pick the right one
The event was cancelled because of _____ weather conditions.
Exercise 2 · Pick the right one
My grandfather is not _____ to trying new food. He loves adventures.
Exercise 3 · Form the word
Related word pairs
'Allude' means to refer to something indirectly; 'elude' means to escape or avoid something cleverly.
"Disinterested" = impartial, with no personal stake; "uninterested" = bored or not interested in something.
"Above" is at a higher level without contact; "over" implies covering, movement, or crossing.
'Currently' means 'at the present time'; 'actually' means 'in reality', not 'nowadays'.
Bryan López
Founder of SpeakUP Academy