vainとは 意味・定義・例文
Adjective 形容詞
1. too proud of yourself, especially of your appearance, abilities, or achievements
虚栄心の強い, 自惚れの強い
She was vain of her beauty.
2. having no (hope of) success
失敗した, 無駄な, 無益な
He tried hard but in vain. ー All his efforts were in vain.