迅速

xùnsù

adjective HSK 5 #3,990

Meanings

Both characters mean 'fast' - doubling the sense of speed.

HSK 3

请迅速离开大楼。

Qǐng xùnsù líkāi dàlóu.

Please leave the building quickly.

HSK 4

中国经济迅速发展。

Zhōngguó jīngjì xùnsù fāzhǎn.

China's economy has developed rapidly.

HSK 6

消防员迅速赶到了现场。

Xiāofángyuán xùnsù gǎndào le xiànchǎng.

The firefighters quickly arrived at the scene.

usage

迅速 is more formal/written than 快. Use 迅速 in news, reports, and formal speech; use 快 in everyday conversation.

迅 xùn

速 sù