释义
adj.
(of an immoral or illegal act or omission)intentional; deliberate
（不道德或非法行为或遗漏）故意的，有意的，存心的
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wilful acts of damage .蓄意破坏行为。
having or showing a stubborn and determined intention to do as one wants, regardless of the consequences or effects
任性的，固执的，执拗的
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the pettish, wilful side of him .他的任性和固执的一面。
词源
"Middle English： from the noun