Answer: halting

AnswerCrossword Clue
HALTINGFull of "ums" and "ers," e.g.
HALTINGHesitant
HALTINGUngraceful, as speech
HALTINGUncertain
haltinglimping or lame
haltingto stop or cause to stop
haltingstop
haltingfaltering or hesitating, esp. in speech
haltingthe act of halting
haltingfaulty or imperfect
haltinglame
haltingto falter or hesitate