HSK C3/W3
Correct

突

/ tū / 
Strokes

Definition

to dash/to move forward quickly/to bulge/to protrude/to break through/to rush out/sudden/Taiwan pr. [tú]

Example

As a Verb

(of a dog) dash out of a cave

As an Adverb

abruptly; suddenly; unexpectedly

As a Verb

dash forward; charge