Cognate with Korean 에서 (-eseo).
이서 (-iseo)
- from; at, in
- ᄒᆞᆨ게서 공븨ᄒᆞ게 ― hawkge-seo gongbuihawge ― Let's study at school.
- 이서 (-iseo) is used after a word ending with a consonant. If the preceding word ends in a vowel, 서 (-seo) is used.
- 의서 (-uiseo) (nonstandard)