This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
滍 combines 氵 (water) with 蚩, which likely contributes the sound. The exact historical development is uncertain.
Water 氵 beside the component 蚩 suggests a possible connection to a river or water-related name, but the meaning is unclear.
For チ, imagine a cheetah drinking from the water: chee -> チ, tying the sound to the water radical.
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