hide, conceal, cover
隱 centers on making something unseen or unknown: hiding, concealing, or covering something from view or knowledge.
隱 combines ⻖ (mound, hill) with 㥯, which likely contributes the sound and the idea of being hidden or concealed. The mound component may suggest something behind or covered by a hill.
The left side ⻖ looks like a hill or barrier, and the right side 㥯 is a dense, complex shape. Picture something tucked behind a hill, completely hidden from sight.
For イン, imagine an inn hidden behind a hill: inn -> イン, and the inn is concealed from the road.