Crossword Clue:

to clamp the teeth together

AnswerCrossword Clue
GRITClamp together, as teeth
GNASHESGrinds the teeth together.
GNASHStrike (the teeth) together.
GNASHEDGround together, as the teeth.
GNASHEDStruck teeth together.
GNASHEDGround together, as teeth
GNASHGrind together, as teeth
GNASHESGrinds together, as teeth
GNASHGrind together, as one's teeth
GRITTINGClamping together, as one's teeth