プログレッシブ和英中辞典(第３版)の解説
わがまま【我が×儘】
〔身勝手〕self-centeredness，((英)) self-centredness; selfishness, egotism; 〔強情〕willfulness，((英)) wilfulness
わがままな｜〔利己的な〕selfish, egotistical; 〔強情な〕willful，((英)) wilful
- わがままに育てられた子供
a spoiled [spoilt／pampered] child - 親の言うことを聞かないわがままな少年
a willful boy who will not listen to his parents - わがままを通す
have one's own way／do whatever one likes - わがままを言うんじゃない
Don't be so selfish.