This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 氻 is uncertain. It visually combines 氵 (water) and 力 (power), but its origin and original meaning are unclear.
With no clear meaning, picture water (氵) and power (力) together: perhaps a powerful current or a water-powered force, but treat this as a visual placeholder only.
For ロク, imagine a lock (ロク) holding back the water's power: the lock controls the force of the water.
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