lukewarm
1. [ adjective ] moderately warm
Synonyms: tepid
Examples:

"he hates lukewarm coffee" "tepid bath water"

Related terms: warm
2. [ adjective ] feeling or showing little interest or enthusiasm
Synonyms: halfhearted
Examples:

"a halfhearted effort" "gave only lukewarm support to the candidate"

Related terms: unenthusiastic
Similar spelling:   lukewarmly