absurdity (n.) Look up absurdity at Dictionary.com
late 15c., from Middle French absurdité, from Late Latin absurditatem (nominative absurditas) "dissonance, incongruity," noun of state from Latin absurdus "out of tune;" figuratively "incongruous, silly, senseless," from ab-, intensive prefix, + surdus "dull, deaf, mute" (see susurration).