unenthusiastic

adjectives

not enthusiastic; lacking excitement or ardor
"an unenthusiastic performance by the orchestra"; "unenthusiastic applause"
unenthusiastic
antonym
enthusiastic
is similar to
feeling or showing no enthusiasm
"a cold audience"; "a cold response to the new play"
cold
is similar to
feeling or showing little interest or enthusiasm
"a halfhearted effort"; "gave only lukewarm support to the candidate"
half-hearted, halfhearted, lukewarm, tepid
see also
not passionate
"passionless observation of human nature"
passionless
see also
lacking ardor or vigor or energy
"a spiritless reply to criticism"
spiritless