-습니다

• ㅂ니다 (-mnida) — after vowels or ㄹ (l)
• 습나이다 (-seumnaida), ㅂ나이다 (-mnaida) — archaic

From earlier ᄉᆞᆸᄂᆡ다 (-seumnaeda) in the nineteenth century, contracted from ᄉᆞᆸᄂᆞ이다 (-seumnaida), used since the seventeenth century. The uncontracted form is still found as 습나이다 (-seumnaida), now archaic.

Ultimately formed by a merger of the Middle Korean verbal suffixes ᄉᆞᆸ〯 (Yale: -sǒp-, object honorific) + ᄂᆞ〮 (Yale: -nó-, present tense marker) + ᅌᅵ (Yale: -ngì-, addressee honorific for questions) + 다〮 (Yale: -tá, declarative mood marker).

The allomorph ㅂ니다 (-mnida) after sonorants represents the fact that the Middle Korean object honorific ᄉᆞᆸ〯 (Yale: -sǒp-) had the allomorph ᅀᆞᆸ〯 (-zǒp-) after sonorants, which became simply ㅂ (-b-) after Middle Korean /z/ was (almost) unconditionally deleted in the sixteenth century.

• (SK Standard/Seoul) IPA^(key): [s͈ɯmnida̠]
• Phonetic hangul: [씀니다]

습니다 • (-seumnida)

1. Declarative suffix for sentence-final verbs in the 하십시오체 (hasipsioche, “formal polite”) speech level.

   고맙습니다. ― Gomapseumnida. ― Thank you.

• → Chinese:
  • Mandarin: 思密達／思密达 (sīmìdá)
• → Japanese: ニダ (nida)

• 정언학 (Jeong Eon-hak) (2006) “통합형 어미 '습니다'류의 통시적 형성과 형태 분석 [tonghaphyeong eomi -seumnida ryuui tongsijeok hyeongseonggwa hyeongtae bunseok]”, in Gugeo gyoyuk, volume 121, pages 317—356