cheer up,perk up,take heart,rally,pick up,bounce back,become more cheerful,become livelier
resist,oppose,contradict,defy,fight (against),go against,kick against
cheer up,brighten up,buoy up,ginger up,perk up,rally,animate,invigorate,hearten,uplift,encourage,stimulate,enliven,make someone happier,raise someone's spirits,give someone a lift,pep upbuck
(of a horse) to perform a buck.
she bucked them off if they tried to get on her back
oppose or resist (something that seems oppressive or inevitable).
the shares bucked the market trend
make (someone) more cheerful.
Bella and Jim need me to buck them up