1590s, "to shed one's clothing," from un- (2) "opposite of" + dress (v.). Transitive sense of "to strip off (someone's) clothing" is recorded from 1610s. Related: Undressed; undressing.
undress (n.)
"state of partial or incomplete dress," 1680s, from undress (v.). Meaning "ordinary dress" is from 1748.
please don't undress in front of everybody!
The nurse quickly undressed the accident victim
a state of undress
undomesticated
undone
undoubtable
undoubted
undreamed
undress
undressed
undue
undulant
undulate
undulation