1) In a half-hearted manner 2) In a half-hearted way 3) In a lukewarm way 4) Lukewarmly 5) Unexcitedly 6) With little enthusiasm 7) With not much oomph 8) Without enthusiasm 9) Without much exuberance Found on https://www.crosswordclues.com/clue/tepidly
1) Byhalves 2) Lukewarmly