Correct

倒灌

/ dàoguàn /

Strokes

Definition

to flow backwards (of water, because of flood, tide, wind etc)/reverse flow/to back up (sewage)

Example

As a Verb

(of flood water, tidal currents, etc) flow from a lower to a higher place

1

Hǎishuǐ

海水

dàoguàn

倒灌

sea water flooded the land

As a Verb

(of smoke) pour in down a chimney