-이시여

Etymology
First attested in the early twentieth century.

From a reanalysis of as being a suffixed form of the copula, which was then made honorific with the suffix.

Particle

 * 1)  O honored...

Usage notes

 * Usually used only when addressing deities and (in historical contexts) monarchs. In North Korea, it is used for the Supreme Leader.
 * When the particle is used, the honorific suffix tends to be deleted.