faint-hearted

英 [ˌfeɪnt ˈhɑːtɪd]

美 [ˌfeɪnt ˈhɑːrtɪd]

adj. 胆怯的; 怯懦的

牛津词典

adj.

ADJ-GRADED 胆怯的;畏怯的
If you describe someone or their behaviour asfaint-hearted, you mean that they are not very confident and do not take strong action because they are afraid of failing.
1. This is no time to be faint-hearted...
  现在不是怯懦的时候。
2. The voters may be ready to punish the politicians who devised a faint-hearted solidarity pact.
  选民们也许已经作好准备，去惩罚那些制订了懦弱的团结协定的政客。
PHRASE 不适于怯懦的人
If you say that something isnot for the faint-hearted, you mean that it is an extreme or very unusual example of its kind, and is not suitable for people who like only safe and familiar things.
1. It's a film about a serial killer and not for the faint-hearted.
  这部电影是讲一个连环杀手的，不适合胆小的人看。

adj

lacking conviction or boldness or courage
1. faint heart ne'er won fair lady
Synonym:faintfaintheartedtimid