simple past tense and past participle of exploit
"The company exploited its employees by making them work excessive hours without extra pay."
In plain English: To be exploited means someone is used for their own benefit without giving fair treatment or respect back to you.
"The company was accused of exploiting its workers by forcing them to work long hours for very low pay."
developed or used to greatest advantage
"The city has successfully exploited its natural harbor to become a major trade hub."
(of persons) taken advantage of
"after going out of his way to help his friend get the job he felt not appreciated but used"