Answer: DUMB

AnswerCrossword Clue
DUMBWord after play or before luck
DUMBWord with luck or waiter
dumbsilent
dumbto reduce the intellectual level of
dumblacking the power of speech (offensive when applied to humans)
dumbincapable of speech / to make silent (making no noise)
dumbsilly or stupid
DUMBSharp's opposite
DUMBCry made repeatedly while slapping the forehead
DUMBWord said three times while smacking the forehead
DUMBSenseless
DUMBType of waiter or bell
DUMBLike Tommy
DUMBSpeechless, so to speak
DUMBWord with bell or waiter
DUMBWord in a Jim Carrey film title
DUMBPrefix for "bell" or "found"
DUMBMute
DUMBKind of bell
DUMBSpeechless.
DUMBEmpty-headed
DUMBThunderstruck.
DUMBMute.
DUMBSilent
DUMBKind of waiter
DUMBSlow-witted
DUMB... Dora
DUMBWaiter or bell
DUMBKind of waiter or bell
DUMBBell predecessor
DUMBLike someone stoned, perhaps
DUMBKind of bell?
DUMBType of luck
DUMBLike some errors
DUMBHardly Einsteinian
DUMBOne way to be struck
DUMBMoronic
DUMBBoneheaded
DUMBInane
DUMBWord before luck or cluck