Synonyms:
used
Meaning: employed in accomplishing something; "the principle of surprise is the most used and misused of all the principles of war"- H.H.Arnold & I.C.Eaker
Synonyms:
exploited, ill-used, put-upon, used, victimized, victimised
Meaning: of persons; taken advantage of; "after going out of his way to help his friend get the job he felt not appreciated but used"
Synonyms:
secondhand, used
Meaning: previously used or owned by another; "bought a secondhand (or used) car"