沢
タク, さわ, うるお.い, うるお.す, つや, おも, さ, さわん, わさ
swamp
JLPT1 G7 S7 F296
As per
睪
# (align) +
水
water → *swamp*; *marsh* (alignment of water and grassland in a shallow body of water).
[Full Kanji Etymology List]