half-hearted
[adjective]
Synonyms: unenthusiastic, apathetic, indifferent, lacklustre, listless, lukewarm, perfunctory, tame

[TahlilGaran] English Synonym Dictionary ▲

half-heart‧ed /ˌhɑːf ˈhɑːtəd◂ $ ˌhæf ˈhɑːr-/ adjective
done without much effort and without much interest in the result:
Congress has made half-hearted attempts at finance reform.
—half-heartedly adverb

[TahlilGaran] Dictionary of Contemporary English ▲

half-hearted
a half-hearted attempt to do something lacks effort and enthusiasm.
I made a half-hearted attempt to start a conversation with him and then gave up.

[TahlilGaran] English Idioms Dictionary ▲

half hearted
adj. Lacking enthusiasm or interest.
Phil made several half-hearted attempts to learn word processing, but we could see that he didn't really like it.

[TahlilGaran] English Idioms Dictionary ▲