vain·ly
adverb/ˈveɪnli/
/ˈveɪnli/
- without success
枉费心机;徒劳无益;白费力气 - He shouted after them, vainly trying to attract their attention.
他在他们的后面高喊,想引起他们的注意,却是徒劳。
Oxford Collocations DictionaryVainly is used with these verbs:- search
- seek
- try
- …
- He shouted after them, vainly trying to attract their attention.