プログレッシブ和英中辞典(第4版)の解説
ひとかわ【一皮】
強がりを言っても一皮むけば気弱な少年に過ぎない
Underneath all his [that] bluff, he is just a timid youngster.
一皮むけば彼は大根役者に過ぎない
Whatever he may look, he is only a ham.
一皮むける
苦労したお陰で彼は一皮も二皮もむけた
Because of the hardships he has gone through, he has matured greatly.