무시

Etymology 1
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Noun

 * 1) purposeful ignoring; disdain, disregard, disrespect

Etymology 2
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Noun

 * 1) time immemorial; the remote past
 * 2)  the eternal without beginning; that which has always existed

Etymology 3
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Noun

 * 1)  any time; a time which is not fixed; a time whose specifics are not important

Etymology 4
See the main entry at.

Usage notes
This word seems to be surviving the ongoing dialect levelling in South Korea rather better than most dialectal forms.