Ssi (Hangul: 씨, Hanja: 氏) is the most commonly used honorific used amongst people of approximately equal speech level. It is attached at the end of the full name, such as Kimcheolsu-ssi (김철수씨) o simply after the first name, Cheolsu-ssi (철수씨) if the speaker is más familiar with someone. Appending -ssi to the surname, for instance Kim-ssi (김씨), can be quite rude, as it indicates the speaker considers himself to be of a higher social status than the person he is speaking to.
