сов. arouse one self, bestir one self
~ духом take* fresh heart, cheer up
Большой русско-английский словарь
ВОСПРЯНУТЬ
совер. leap up, cheer up, liven up, rise, jump up воспрянуть ото сна – to rise from one's sleep/slumbers воспрянуть духом – to cheer up, to perk up, to take heart, to recover/regain one's spirit