-오

Etymology
See the main entry.

Usage notes

 * For comments regarding the relationship between and  in the imperative mood, see "Usage notes" at.

Etymology 2
Lenition in voiced environments. See Appendix:Koreanic reconstructions for more.

Usage notes

 * This allomorph only occurs after coda liquid, a falling diphthong, the copula , or the passivizing auxiliary . The velar stop is preserved before all other vowels.

Etymology 3
Lenition in voiced environments. See Appendix:Koreanic reconstructions for more.

Usage notes

 * This allomorph is obligatory after, , or (note that the irrealis suffix  is excluded here). It sometimes appears before other vowels as well.
 * It was sometimes pronounced as and sometimes as, as can be perceived from orthographic variation between e.g.  and.