noun, takes する

  1. inundating a castle, cutting off a castle's water supply.

Variations

Pronunciation Kanji Kana Is Common
 
水攻め みずぜめ

Contained Kanji Breakdown

water
みず スイ み (1st, N5)
aggression, attack, criticize
コウ せ.める おさむ (7th, N1)
craft, construction, katakana e radical (no. 48)
コウ ク もく (2nd, N4)
strike, hit, folding chair radical variant (no. 66)
ホク (Kentei 1)
person(人) variant
mow, cut grass, subdue
ガイ ゲ おさ.める (Kentei 1)