Consciously restrain from showing; of emotions, desires, impulses, or behavior:
— He let his anger bottle up until he exploded.

synonyms: inhibit, suppress.

Roget 528: conceal, hide, secrete, put out of sight; lock up, seal up, bottle up.    encrypt, encode, cipher.    cover, screen, cloak, veil, shroud; cover up one's tracks; screen from sight, screen from observation; drawing the veil; draw the curtain, close the curtain; curtain, shade, eclipse, throw a view over; be cloud, be mask; mask, disguise; ensconce, muffle, smother; befog; whisper.    keep from; keep back, keep to oneself; keep snug, keep close, keep secret, keep dark; bury; sink, suppress; keep from, keep from out of view, keep from out of sight; keep in the shade, throw into the shade, throw into background; stifle, hush up, smother, withhold, reserve; fence with a question; ignore etc. 460.    keep a secret, keep one's own counsel; hold one's tongue etc. (silence) 585; make no sign, not let it go further; not breathe a word, not breathe a syllable about; not let the right hand know what the left is not let the right hand know what the left is doing; hide one's light under a bushel, bury one's talent in a napkin.    keep in the dark, leave in the dark, keep in the ignorance; blind, blind the eyes; blindfold, hoodwink, mystify; puzzle etc. (render uncertain) 475; bamboozle etc. (deceive) 545.    be concealed etc. v.; suffer an eclipse; retire from sight, couch; hide oneself; lie hid, lie in perdu [Fr.], lie in close; lie in ambush (ambush) 530; seclude oneself etc. 893; lurk, sneak, skulk, slink, prowl; steal into, steal out of, steal by, steal along; play at bopeep^†, play at hide and seek; hide in holes and corners; still hunt.    ... show more

Roget 751: restrain, check; put under restraint, lay under restraint; enthral, enthrall, inthral^†, inthrall^†, bethral^†, bethrall^†; restrict; debar etc. (hinder) 706; constrain; coerce etc. (compel) 744; curb, control; hold back, hold from, hold in, hold in check, hold within bounds, keep back, keep from, keep in, keep in check, keep within bounds; hold in leash, hold in leading strings; withhold.    keep under; repress, suppress; smother; pull in, rein in; hold, hold fast; keep a tight hand on; prohibit etc. 761; inhibit, cohibit^†.    enchain; fasten etc. (join) 43; fetter, shackle; entrammel^†; bridle, muzzle, hopple^†, gag, pinion, manacle, handcuff, tie one's hands, hobble, bind hand and foot; swathe, swaddle; pin down, tether; picket; tie down, tie up; secure; forge fetters; disable, hamstring (incapacitate) 158.    confine; shut up, shut in; clap up, lock up, box up, mew up, bottle up, cork up, seal up, button up; hem in, bolt in, wall in, rail in; impound, pen, coop; inclose etc. (circumscribe) 229; cage; incage^†, encage^†; close the door upon, cloister; imprison, immure; incarcerate, entomb; clap under hatches, lay under hatches; put in irons, put in a strait-waistcoat; throw into prison, cast into prison; put into bilboes.    arrest; take up, take charge of, take into custody; take prisoner, take captive, make prisoner, make captive; captivate; lead captive, lead into captivity; send to prison, commit to prison; commit; give in charge, give in custody; subjugate etc. 749.    ... show more

Dutch: knarsetanden, tandenknarsen, verbijten