The definition of tepid is something that is lukewarm, not hot. It also is someone or something that indicates very little warmth or enthusiasm.
Not very warm or enthusiastic
Having or showing enthusiasm; ardent
Having or expressing desire; desiring:
Predominantly red or yellow in tone:
Find another word for half-hearted. In this page you can discover 15 synonyms, antonyms, idiomatic expressions, and related words for half-hearted, like: enthusiastic, desirous, interested, warm, tepid, lukewarm, half-heartedly, half-arsed, pathetic, feeble and ham-fisted.