Where does “여닫이문” come from?

여닫이문 (Korean) comes from Korean 여닫이, from Korean —이, from Middle Korean 이 — person.

Ancestry of “여닫이문”, step by step

여닫이문 traces back through two separate lines of ancestry.

via Korean 여닫이

StepLanguageWordMeaning
1Korean여닫이swing door
2Korean—이For non-honorific nouns ending in consonants, the nominative case particle marking it as the subject of a verb or adjective; see also Usage Notes
3Middle Koreanperson

via Korean 문(門)

StepLanguageWordMeaning
1Korean문(門)
Every word from Middle Korean