-곳

Etymology
Unattested in Old Korean, where only (whence Middle Korean ) is attested.

In Middle Korean, and  appear to be wholly synonymous except that the former is much more common (the latter is also not attested outside conditional clauses, but this may be a result of its rarity). It is often speculated that they stem from the same etymon and that there is a diachronic shift from 火叱 / ᄇᆞᆺ > 곳, but the phonological differences are difficult to resolve.

Particle

 * 1)  as long as

Usage notes

 * This particle was syntactically quite versatile and has been attested after nouns, adverbs, inflected verbs, and case markers. A 2009 analysis of over four hundred instances of this particle in the Middle Korean corpus showed that around 80% of all attestations are from conditional clauses. It was used into Early Modern Korean, but slowly declined until final obsolescence in the nineteenth century.