Answer: cannot

AnswerCrossword Clue
CANNOT"He who ..., teaches" (G.B.S.)
cannothave no alternative but to
cannotform of can not
cannota negative of can, no inflections
CANNOTLacks the ability
CANNOTI .... tell a lie
CANNOTLack the wherewithal, e.g.
CANNOTLack the wherewithal
CANNOTLacks what it takes
CANNOTDefeatist's word
CANNOT"... a plain man live . . . ?": Shak.
CANNOT"He who ..., teaches" (Shavian put-down)
CANNOT"I ... tell a lie"
CANNOT"I ... tell a . . . "
CANNOT" . . . against itself ... stand"
CANNOTLacks the means to
CANNOTIs unable
CANNOTLacks ability
CANNOT"I ... sing the old songs . . . "
CANNOTRelative of "cain't."
CANNOT"I ... tell a lie."
CANNOT"I ... Sing the Old Songs."
CANNOT"Age ... wither her."
CANNOTIs unable.
CANNOTLack the skill
CANNOTLacks the wherewithal
CANNOTRefuses to
CANNOTIs unable to
CANNOT"I .. tell ..."
CANNOTCommon error message word