1520s, from M.Fr. absurdité,
from L. absurditatem
) "dissonance, incongruity," from absurdus
"out of tune, senseless," from ab-
intens. prefix + surdus
"dull, deaf, mute" (see susurration
). The main modern sense (also present in L.) is a fig. one, "out of harmony with reason or propriety."