Kanji: 水 mizu water
Squeeze a river (川) and you get water.
JLPT N5: 24 / 100 | 4 Strokes
This kanji as a radical often looks like 氵 and is found with kanji dealing with water.
大水 oo mizu - flood [lit. big water]
水着 mizu gi - swimsuit, bathing suit
水曜日 sui you bi - Wednesday
mizugi wo motteimasu ka?
Do you have your swimming trunks?