-으키어

Etymology
From.

Usage notes
Although this ending looks to be analogous to the Korean or   endings in terms of speech levels, in Jeju grammar, it makes a part of the "plain style"  formal non-polite speech level. This is due to the fact that the ending cannot be added to it, being analogous to the Korean  ending which can only be added to  or  endings. The equivalent Jeju ending is  (also spelled as  by O'Grady et al.).