Answer: interrupt

AnswerCrossword Clue
INTERRUPTBe impolite, in a way
INTERRUPTButt in
INTERRUPTDiscontinue
INTERRUPTBreak the continuity.
INTERRUPTBreak in upon.
INTERRUPTSpeak out of turn.
interruptObstruct (something, esp. a view)
interruptto break in between
interruptBreak the continuity of (a line or surface)
interruptStop the continuous progress of (an activity or process)
interruptStop (someone speaking) by saying or doing something