Korean slang profile
사이
sai
Cyworld, shortened
A shortened name for the internet service Cyworld.
- Expanded form
- cyworldcyworld
- Other spellings
- —
- Earliest source found
- 2004
- Documented trend period
- Not verified
This is the earliest source we have verified, not the date the term was coined.
01Examples, with English translations
- Example by Julimmal
예전에 사이 미니홈피에 올렸던 사진이 생각났다.
I remembered photos I once posted on my 사이 mini homepage.
02Documented history
- 2004The National Institute of Korean Language’s 2004 new-word collection lists the headword “사이” and its definition.[1]
03Origin & word formation
The collection gives a shortened form of cyworld and defines it as the internet service Cyworld. Who first used it and when have not been verified.
Evidence for the origin explanationHigh
The headword, definition, and source-language spelling in the 2004 collection were compared. The original older articles re-quoted there were not directly opened, so their dates were not used for firstSeen. The first coinage and spread remain unverified.
04Sources
Original titles and links are preserved. An English translation does not replace the original source.
- 2004년 신어 (국립국어원)Published 2004Original source checked Nov 14, 2026