railing, fence an enclosed place
棥 centers on a barrier made of crossed or woven material: a railing or fence that encloses a space.
棥 combines 林 (trees/wood) with 爻 (crossed lines), suggesting a fence or railing made from crossed wooden branches or stakes. The exact historical development is uncertain, but the component arrangement fits the meaning of an enclosure.
Picture two trees (林) with crossed branches (爻) woven between them to form a sturdy fence or railing around a garden.
For ハン, imagine a hand (ハン sounds like 'hand' in some accents) weaving crossed branches into a fence: hand -> ハン, and the hand builds the enclosure.