lukewarm lukewarm /ˈluːˈkwɔrm/

adjective

1. () Feeling or showing little interest or enthusiasm  ( half-hearted , halfhearted , tepid , lukewarm )
   feeling or showing little interest or enthusiasm
    A halfhearted effort
   a halfhearted effort
    Gave only lukewarm support to the candidate
   gave only lukewarm support to the candidate
   
2. () Moderately warm  ( lukewarm , tepid )
   moderately warm
    He hates lukewarm coffee
   he hates lukewarm coffee
    Tepid bath water
   tepid bath water