Left: hand 扌, right: excellent 卓 ([before the day happens:] Fortune telling 卜 early at the morning 早 is excellent.) [卜 = divining = crack in turtle's shell]
Mnemonic
(As a support/hold when falling) A hand is excellent, when you fall.
This radical is considered to be a simplification of: fortune telling 占 (crack 卜 in the shell 口 of a turtle from which the fortune was told.). Sometimes it is read as a forking of a road.
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