undeceive, v. disabuse, [disillusionize], disillusion.
undeceiving, n. disillusion, disillusionment.
undecided, a. [unsettled], [pending]; [wavering], [irresolute], [dubious], controvertible.
undecipherable, a. illegible.
undefinable, a. [unexplainable], undeterminable.
undefined, a. [vague], [indefinite], [obscure]; [boundless], limitless.
undemonstrative, a. [staid], [quiet], [demure], [phlegmatic], [sedate].
undeniable, a. incontestable, [indisputable], [unquestionable], indubitable, irrefragable, incontrovertible, unimpeachable.
under, prep. beneath, [below], subordinate, [inferior], subject to.
under, a. subordinate, subaltern, [inferior], subjacent.