プログレッシブ和英中辞典(第4版)の解説
わきやく【脇役】
&fRoman1;〔役〕a supporting [secondary] role；〔人〕a supporting actor
彼はその映画で脇役を務めた
He played a supporting [secondary] role in that film.
&fRoman2;〔補佐する人〕
彼は一生社長の脇役に徹した
He stayed in the background playing a secondary role to the president all his life.
もう脇役はこりごりだ
I won't take a backseat any longer.／I don't want to play second fiddle any more.