From The Collaborative International Dictionary of English v.0.44 [gcide]:
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
26 Moby Thesaurus words for "halfhearted": Laodicean, bland, changeable, cold, cool, fervorless, indecisive, indifferent, infirm of purpose, infirm of will, insipid, irresolute, lukewarm, milk-and-water, milky, mushy, neuter, neutral, perfunctory, tasteless, tepid, unenthusiastic, vapid, watery, wishy-washy, zealless
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Let's see what we can do if we put our heads together.0