uncle, a. Associated word: avuncular.
unclean, a. soiled, [dirty], [foul], [filthy], [nasty], uncleanly; tref ([Jewish]); polluted, defiled, [impure].
uncommon, a. [unusual], [singular], [rare], [unique], [queer], [strange], [odd], [anomalous], exceptional, [abnormal], variant, [nondescript], [extraordinary], [noteworthy], [remarkable], aberrant.
uncommunicative, a. [reserved], taciturn, [reticent], [secretive].
uncompelled, a. [voluntary], [spontaneous], [gratuitous], [unconstrained], volitional.
uncomplaining, a. [resigned], [patient], [forbearing], [long-suffering], [meek].
uncomplimentary, a. [unflattering], [frank], [derogatory], [blunt].
uncompromising, a. [inflexible], irreconcilable, intransigent, [firm].
unconcern, n. [indifference], [nonchalance], [apathy], disinterestedness.
unconcerned, a. [indifferent], [nonchalant], [cool], [apathetic], [disinterested].