발가벗다

Etymology
First attested in the Gyobon Yeokdae Sijo Jeonseo (교본 역대 시조 전서) as

Verb

 * 1) to take off all one's clothes, to be naked
 * 2)  a state in which there are few trees or grasses on a mountain, so that the soil is exposed.
 * 3)  a condition in which the leaves of a tree have fall and its branches are exposed
 * 4) a state in which you have nothing more to keep or hide by disclosing all your belongings, thoughts, facts, etc.