tū
suddenly
Depicts a dog (犬) suddenly running out of a cave (穴).
Evolution

Oracle script
(~1250-1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
tū
suddenly, abruptly, unexpectedly; to dash; to move forward quickly; to bulge; to protrude; to break through; to rush out; sudden; Taiwan pr. [tú]
Sources