to restrain, hinder, arrest, or check (an action, impulse, etc.).

to prohibit; forbid.

Psychology . to consciously or unconsciously suppress or restrain (psychologically or sociologically unacceptable behavior).

Chemistry . to decrease the rate of action of or stop (a chemical reaction).

verb

aid , allow , approve , assist , free , help

verb

arrest , avert , bar , bit , bridle , check , constrain , cramp , curb , discourage , enjoin , faze , forbid , frustrate , hang up * , hinder , hog-tie , hold back , hold down , hold in , impede , interdict , keep in , obstruct , outlaw , prohibit , put on brakes , repress , restrain , sandbag , stop , stymie , suppress , taboo * , ward , withhold , brake , hold , keep , keep back , pull in , rein , constrict , ban , debar , disallow , proscribe , taboo , deter , prevent , restrict