D defs.my
Entry 1 sense Webster, 1913

Underwhelm

/ŭnˌ-dẽrw-ĕlm'/ · Un·der·whelm · IPA /ˌʌndərwˈɛlm/
01 v. t. To interest less than anticipated; to be dull to (a person).
  1. 1.
    To interest less than anticipated; to be dull to (a person).