突

tū

to dash

to move forward quickly; to bulge; to protrude; to break through; to rush out; sudden; Taiwan pr. [tu2]

hole (穴) + dog (犬) = a dog bolting out suddenly

A dog bursting out of a den captures the character perfectly: sudden, forceful, unexpected movement. That image of a dog exploding from a hole is where the sense of 'sudden' and 'dash forward' lives.

穴+犬→突

犬DogSemantic

穴CaveSemantic

Words with 突

边境冲突

biān jìng chōng tū

border clash

错义突变

cuò yì tū biàn

missense mutation

乳突

rǔ tū

mastoid process

乳突窦

rǔ tū dòu

mastoid antrum (bones at the back of tympanic chamber)

人类乳突病毒

rén lèi rǔ tū bìng dú

human papillomavirus (HPV)

利害冲突

lì hài chōng tū

conflict of interest

利益冲突

lì yì chōng tū

conflict of interest

吉罗米突

jí luó mǐ tū

kilometer (old) (loanword)

唐突

táng tū

to be rude

地区冲突

dì qū chōng tū

local or regional confrontation

基因突变

jī yīn tū biàn

genetic mutation

基罗米突

jī luó mǐ tū

kilometer (old) (loanword)

More characters with 穴

屄穿窥帘穷窕