seumnida
seumnida is a Korean grammatical ending that functions as a formal polite declarative sentence ending. It is derived from the verb stems "hada" (to do) or "issda" (to be) combined with the formal polite speech level marker "seumnida". For example, "kamsahamnida" (thank you) is a formal polite way of saying "I do it" or "it is done" in gratitude. Similarly, "annyeonghaseumnida" is a formal polite greeting.
The use of "seumnida" indicates a high level of respect towards the listener and is commonly employed