to go in; to come in / 要る: to be necessary, to be required

to enter, go into, get into a place or a thing / to join a group or organization / to be contained (in), to be included (in) / to be a member of a group, set, category

swing door

platform door; platform screen door

(rail transport) selective door operation

Alternative spelling of スイングドア

peephole (hole in a door through which to look)

an adult son residing with his parents; generally has not yet or can not come into family inheritance / a female servant working in a daimyō, ōoku, or other high-ranking house

room rent

stand out, attract notice