-으면

Etymology
From, a Middle Korean innovation from  +. Modern speakers do not perceive it as such.

Suffix

 * 1) if, when

Usage notes

 * Unlike most suffixes with epenthetic, this suffix does not cause elision of , as its starting consonant is : , not.
 * when sense is only used with and never with other variants such as, as they show less possibility of a certain action happening.