Synonyms of halfhearted

1 Syllable
cool, tame
2 Syllables
neutral, tepid, listless
3 Syllables
lukewarm, unstirred, lackluster, unpitying, passive, spiritless
4 Syllables
perfunctory, unlively, impassive, aversive, indifferent, apathetic, on-the-fence, energyless
5 Syllables
unenthusiastic, uninterested, unsympathetic, irresolute, lackadaisical
6 Syllables
uncompassionate