Improper treatment or use; application to a wrong or bad purpose; misuse; as, an abuse of our natural powers; an abuse of civil rights, or of privileges or advantages; an abuse of language.(noun)
use wrongly or improperly or excessively(verb.change)
Example: Her husband often abuses alcohol.
While she was pregnant, she abused drugs.
source: wordnet30
To put to a wrong use; to misapply; to misuse; to put to a bad use; to use for a wrong purpose or end; to pervert; as, to abuse inherited gold; to make an excessive use of; as, to abuse one's authority.(verb)