" lukewarm "

1: having or giving off heat to a moderate degree;

  * e.g., " ... I left the bowl of soup sitting on the counter too long, and now it's lukewarm "

•  Synonyms : 

•  heated,

•  hottish,

•  tepid,

•  toasty,

•  warm,

•  warmed,

•  warmish

•  Antonyms : 

•  chilled,

•  coldish,

•  cool,

•  cooled,

•  coolish,

•  refrigerated,

•  unheated

2: showing little or no interest or enthusiasm;

  * e.g., " ... the dentist's lecture on the merits of flossing got only a lukewarm response "

•  Synonyms : 

•  halfhearted,

•  tepid,

•  uneager,

•  unenthusiastic

•  Antonyms : 

•  eager,

•  enthusiastic,

•  hearty,

•  keen,

•  passionate,

•  warm,

•  wholehearted