faint-heart‧ed /ˌfeɪnt ˈhɑːtəd $ -ɑːr-/ adjective

1. not trying very hard, because you do not want to do something, or you are not confident that you can succeed Synonym : half-hearted:
She made a rather faint-hearted attempt to stop him from leaving.

2. something is not for the faint-hearted used humorously to say that something is difficult and needs a lot of effort

[TahlilGaran] Dictionary of Contemporary English ▲