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Verb: shut one's mouth
  1. Refrain from divulging sensitive information; keep quiet about confidential information
    - keep quiet, keep one's mouth shut

Derived forms: shuts one's mouth, shutting one's mouth, shut one's mouth

Nearest

shunning
shunt
shunt circuit
shunter
shush
shut
shut away
shut down
shut in
shut off
shut one's mouth
shut out
shut up
shutdown
Shute
shuteye
shut-eye
shut-in
shutout
shutter
shutterbug