sickle handle, type of tree
梍 centers on a specific type of tree, with the sickle handle meaning likely derived from the wood of that tree or a similar application.
梍 combines 木 (tree) with 皂, which likely contributes the sound. The exact historical development is uncertain, but it is a phono-semantic compound referring to a type of tree.
A tree 木 with a white 白 spoon 匕 shape on the right: imagine a tree whose wood is so pale it looks like a white spoon, and its branches are perfect for making sickle handles.
For ユウ, picture you using a sickle handle made from this tree: you -> ユウ, and you swing the sickle smoothly.
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