noun, noun or participle which takes 'suru', intransitive verb
full of water; filled to the brim with water
Describes a container, reservoir, or area being completely filled with water. Often used in technical or descriptive contexts.
ダムは満水状態だ。
The dam is full of water.
大雨で川が満水になった。
The river became full of water due to heavy rain.
満杯 means 'full' in a general sense (e.g., a full glass, a full schedule), while 満水 specifically refers to being full of water.
Compound of 満 (man, 'full') and 水 (sui, 'water').