LUKEWARM
halfhearted, half-hearted, tepid, lukewarm
(adjective) feeling or showing little interest or enthusiasm; “a halfhearted effort”; “gave only lukewarm support to the candidate”
lukewarm, tepid
(adjective) moderately warm; “he hates lukewarm coffee”; “tepid bath water”
Source: WordNet® 3.1
Etymology
Adjective
lukewarm (comparative lukewarmer or more lukewarm, superlative lukewarmest or most lukewarm)
(temperature) Between warm and cool.
Not very enthusiastic (about a proposal or an idea).
Synonyms
• tepid
Source: Wiktionary
Luke"warm`, a. Etym: [See Luke.]
Definition: Moderately warm; neither cold nor hot; tepid; not ardent; not
zealous; cool; indifferent. " Lukewarm blood." Spenser. " Lukewarm
patriots." Addison.
An obedience so lukewarm and languishing that it merits not the name
of passion. Dryden.
– Luce"warm`ly, adv.
– Luce"warm`ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition