This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
漖 combines the water radical 氵 with 教, which likely contributes the sound. The exact historical development is uncertain, and the character is rare.
The water radical 氵 beside 教 suggests something related to water, but the specific meaning is unclear. Imagine a teacher (教) pouring water (氵) to explain a concept, though the real meaning is uncertain.
For コウ, use the reading of the right-side component 教 (キョウ) as a close hook: think of a coach (コウ) teaching by the water, where coach -> コウ.
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