This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
枖 combines 木 (tree) with 夭, but the exact historical development is uncertain. The character is rare and its original meaning is unclear.
The kanji shows a tree 木 beside 夭, but without a known meaning, it is best remembered as a rare character with an uncertain sense.
For ヨウ, imagine a young (幼, ヨウ) tree 木: the reading ヨウ is shared with 幼, and the tree component ties it to the kanji shape.
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