to use power or knowledge unfairly or wrongly
abuse
[U, sing.] the use of sth in a way that is wrong or harmful 滥用；妄用 SYN misuse
alcohol/drug/solvent abuse
酗酒；嗜毒；溶媒滥用
The system of paying cash bonuses is open to abuse (= might be used in the wrong way).
支付现金红利制度可能被人钻空子。
~ of sth
He was arrested on charges of corruption and abuse of power.
他因被控贪污腐化和滥用职权而遭逮捕。
What she did was an abuse of her position as manager.
她的所作所为是滥用经理职权。