misused

adjectives

used incorrectly or carelessly or for an improper purpose
"misused words are often laughable but one weeps for misused talents"
misused
antonym
used
is similar to
used improperly or excessively especially drugs
"an abused substance"
abused
is similar to
of persons; taken advantage of
"after going out of his way to help his friend get the job he felt not appreciated but used"
exploited, ill-used, put-upon, used, victimised, victimized