to put (something) to a wrong or improper use
You must not abuse the privilege of your position
to attack (somebody) in words; to revile
to harm or injure (a person or animal) by wrong or cruel treatment; to maltreat
This dog was abused by its previous owner
abuser noun
[Middle English abusen via French from Latin abusus, past part. of abuti, from ab- + uti to use]