Synonyms and related words :
apathetic, backward, balking, balky, blase, cold, cool, desireless, dilatory, grudging, halfhearted, inappetent, indifferent, laggard, loath, loveless, lukewarm, nirvanic, passionless, perfunctory, reluctant, renitent, restive, slow, slow to, un-come-at-able, unambitious, unapproachable, unaspiring, unattainable, unattracted, undesirous, uneager, unexcited, ungetatable, unimpressed, uninterested, unobtainable, unreachable, unresponsive, unzealous