
Impair
Slight Damage
Impair indicates a partial, rather than a complete, decline in function or condition.

Overworking might impair your health slightly, but not ruin it.
Negative Outcome
Using 'impair' suggests that the effect or outcome is negative or undesirable.

Poor lighting can impair visibility on the road.
Not Permanent
The damage or weakening implied by 'impair' is often temporary or reversible.

Lack of sleep may impair cognition until you can rest.
Compare with
DamageDiminishDisableErodeHarmHurtInjureSabotageWeaken
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