Answer: bitesonestongue

AnswerCrossword Clue
BITESONESTONGUEShuts up
BITESONESTONGUETries hard to remain silent
BITESONESTONGUERefrains from an indiscreet remark
BITESONESTONGUEHolds an opinion
BITESONESTONGUEWithholds an opinion