adj
deliberate ; obstinate ; insistent on having one's way 고의적인, 계획적인 ; 고집센 ; 제멋대로만 하려고 하는

• The mother insisted that the killing committed by her son ahd not been willful, but the jury apparently believed that he had known what he was doing.
• When her mother told her shhe coudn't have a cookie, the willful little girl simply snached the cookie jar and ran out the roomn with it. She had stolen cookies willfully.
  엄마가 쿠키를 먹지 말라고 하자, 고집에 센 소녀는 쿠키 병을 낚아채서 들고는 방 밖으로 도망을 갔다. 소녀는 쿠키를 제멋대로 훔친 것이다.