adj.not enthusiastic; lacking excitement or ardor

"an unenthusiastic performance by the orchestra"; "unenthusiastic applause"

Unenthusiastic About Enthusiasm
PE pipe makers unenthusiastic about 2003
Are European EDs unenthusiastic about chest pain units?
House chairman apparently unenthusiastic about McCain bill
Unenthusiastic Europeans or Affected English: the Impact of Intonation on the Overall Make-up of Speech
6. What Nontraditional Approaches Can Motivate Unenthusiastic Students?.
Too many patients are unaware of, and unenthusiastic about, bowel cancer screening
Inadequate Product and Market Innovations: Unenthusiastic Commitment and Support
Inadequate Product and Market Innovations: Unenthusiastic Commitment and Support
I'd rather play twister with John Hopoate: Engaging the unenthusiastic student