vain (EN)

形容詞

形容詞 “vain”

1. 無駄な
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   They tried in vain to push the broken car up the steep hill.
2. うぬぼれた (特に外見や成果に関して)
   She was so vain that she spent hours looking at herself in the mirror every day.
3. 空虚な (本当の価値や意義がないことを指す)
   His promise turned out to be vain when he failed to follow through with any action.