-데

Etymology
First appears in the late sixteenth century as. Traditionally analyzed as a shortening of, from  +  + , with the last being fully deleted.

However, Jang Yun-hui suggests that it may be more appropriate to posit as a colloquial Middle Korean verb-final suffix, in which case this is a simple compound of  +.

Usage notes

 * Koreans sometimes confuse this with homophonous, which is used to mark reported speech: