vain
🇺🇸
/veɪn/
🇬🇧
/veɪn/
useless or without success
He tried in vain to fix the broken toy.
他試圖修理那個壞掉的玩具,但徒勞無功。
too proud of how you look or what you can do
She is too vain to admit she needs help.
她太自負了,不肯承認自己需要幫助。