tepid

/ˈtɛpɪd/
adjective
  1. Only slightly warm; lukewarm.
    • The soup had gone tepid after sitting on the counter for an hour.
    • The bathwater was tepid, so she added more hot water.
    • He took a sip of the tepid coffee and grimaced.
  2. Showing little enthusiasm or excitement; halfhearted.
    • Her tepid response to the proposal made it clear she wasn't interested.
    • The movie received tepid reviews from critics.
    • The audience gave the comedian a tepid round of applause.