This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 覕 is uncertain. It visually combines 必 and 見, but the original semantic and phonetic roles are unclear.
Since the meaning is uncertain, focus on the shape: 必 (inevitable) and 見 (see) together could suggest something that must be seen, but this is only a mnemonic, not a real meaning.
For メチ, imagine a rare, unseen creature called a 'mechi' that you must inevitably see: mechi -> メチ, and 覕 is the act of glimpsing it.
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