undo, v. [reverse], [annul], [nullify], [abrogate], [neutralize], [invalidate]; [loose], unfasten, disentangle; impoverish, [ruin].
undoing, n. reversal, [annulment], [invalidation], [abrogation]; impoverishment, [ruin].
undoubted, a. indubitable, [unquestioned], unchallenged, undisputed.
undoubting, a. [sure], [confident], sanguine, implicit.
undress, n. dishabille, negligee.
undress, v. disrobe, [strip], divest, doff, disarray.
undressing, n. disrobing, [stripping].
undue, v. [unreasonable], [immoderate], [exorbitant], [excessive], disproportioned.
undutiful, a. [disobedient], unfilial.
undying, a. [deathless], immortal.