tepid
adjective
[ ˈtɛpɪd ]
• (especially of a liquid) only slightly warm; lukewarm.
• "she soaked a flannel in the tepid water"
• showing little enthusiasm.
• "the applause was tepid"
Similar:
unenthusiastic,
apathetic,
half-hearted,
indifferent,
cool,
lukewarm,
uninterested,
unconcerned,
offhand,
perfunctory,
desultory,
limp,
listless,
unenthused,
half-arsed,
half-assed,
Origin:
late Middle English: from Latin tepidus, from tepere ‘be warm’.