exploited

(verb) use or manipulate to one's advantage. Synonyms: exploit, work. Examples: "He exploit the new taxation system." "She knows how to work the system." "He works his parents for sympathy."

(verb) draw from; make good use of. Synonyms: exploit, tap. Example: "We must exploit the resources we are given wisely."

(verb) work excessively hard. Synonyms: overwork, exploit. Example: "He is exploiting the students."

(adj) developed or used to greatest advantage. Synonyms: exploited (vs. unexploited).

(adj) of persons; taken advantage of. Synonyms: ill-used, put-upon, used, victimized, victimised. Example: "After going out of his way to help his friend get the job he felt not appreciated but used."