水 (Kanji for water)

Mutants

waterleft

Onyomi

SUI	After 4 days in the desert, the water tasted SWEET.

Mnemonic

The vertical stroke is like a waterfall, with four drops of water splashing out from it.

Kunyomi

みず	water ★★★★★

Jukugo

水曜日(すいようび)	Wednesday ★★★★★ KUN ON 水 (water) + 曜日 (day of week) = 水曜日 (Wednesday)
水着(みずぎ)	swim-suit ★★★☆☆ KUNKUN 水 (water) + 着 (wear / arrive) = 水着 (swim-suit)
香水(こうすい)	perfume ★★☆☆☆ 香 (good smell) + 水 (water) = 香水 (perfume)
水族館(すいぞくかん)	aquarium ★★☆☆☆ 水 (water) + 族 (family) + 館 (big hall) = 水族館 (aquarium)
水商売(みずしょうばい)	hostess clubs, host clubs,strip clubs, etc. ★★☆☆☆ KUN ON 水 (water) + 商売 (a business) = 水商売 (hostess clubs, host clubs,strip clubs, etc.)
洪水(こうずい)	flood ★☆☆☆☆ 洪 (flood) + 水 (water) = 洪水 (flood) flood (be careful - the す is pronounced ず、which is really unusual.)
水滴(すいてき)	drop of water ☆☆☆☆☆ 水 (water) + 滴 (drip) = 水滴 (drop of water) a drop of water
排水溝(はいすいこう)	big ditch. ☆☆☆☆☆ 排 (eliminate) + 水 (water) + 溝 (ditch) = 排水溝 (big ditch.) big ditch. who cares.

Lookalikes

	Meaning	Hint
氷	ice	ONE SNOWFLAKE-DOT
水	water	NO FLAKES AT ALL
永	forever	TWO SNOWFLAKE-DOTS

Ice has the SNOWFLAKE on top, water doesn't. So you can say, "Water doesn't have a SNOWFLAKE because water is warm."
If it has been icy for ever, there are TWO SNOWFLAKES piled up on top of each other!