扩散

擴散

kuòsàn

verb HSK 7-9 #6,918

Meanings

消息很快扩散开来。

Xiāoxi hěnkuài kuòsàn kāilái.

The news spread quickly.

我们要防止污染扩散。

Wǒmen yào fángzhǐ wūrǎn kuòsàn.

We must prevent the pollution from spreading.

usage

扩散 emphasizes outward spreading in all directions (like gas or disease). Compare 传播 which emphasizes transmission from person to person.

扩 kuò

散 sàn