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deleterious

adjective

Definition: causing harmful or damaging effects

Synonyms: destructive, harmful, damaging, pernicious, noxious, toxic, injurious

Antonyms: helpful, salubrious, advantageous

Tips: Deleterious comes from the Greek word deleterios, "noxious." In its modern usage, it can mean that something is noxious and therefore harmful to someone, or simply that something is harmful or destructive, without necessarily being noxious. For a memory trick, think of the word delete when remembering the definition for deleterious. Delete means "to remove or destroy." It could be very deleterious (harmful, damaging) to your career if you were to delete (destroy, remove) a serious and important computer file.

Usage Examples:

Recent studies show that consuming too much protein may be deleterious to health. (harmful, damaging)

The downturn in investments has been quite deleterious to our business. (destructive, damaging)

That's a deleterious chemical and must be handled very carefully. (toxic, harmful)

Attending very loud concerts can be deleterious to your hearing. (damaging, injurious)


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