Left: water 水, right: agriculture 農 (fructuous fields 曲 [=field 田 with sprouts ||] and: to plow 辰 (At the field corner 厂 a first line 一 is plowed by the farmer 农 [农=Chinese for farmer])
Mnemonic
Water in agriculture makes everything grow more concentrated and thicker.
Actually 7 - 9 a.m., and above it assigned to the zodiac sign: Dragon. Here pragmatically understood as "plow". At the field corner 厂 a first line 一 is plowed by the farmer 农 [农= Chinese for farmer].
Tip: Go to the radicals that are contained in this character and learn all the characters with this radical systematically!
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