함

Etymology 1
.

Noun

 * 1) box

Etymology 2
.

Noun

 * 1) warship

Etymology 3
Probably originally dialectal or alternately a fairly recent contraction, since it is not found in dictionaries of the standard language. Nowadays used in Seoul as well.

Usage notes

 * Generally used only with certain common verbs, among which the most common is.
 * The contraction is not used for the literal "once" sense.

Etymology 5
Korean reading of various Chinese characters.