illicit
adj
(a) not allowed by law; illegal 法律不许可的; 违禁的; 非法的
the illicit sale of drugs 毒品的非法贩卖.
(b) not approved by the normal rules ofsociety 违反社会规则的; 不正当的
an illicit relationship不正当的关系.
In times of peace, when business was bad, Hawkwood and his men would march into a city-state and, after burning down a few farms, would offer to go away protection money was paid to them.