n. & adj.
n. 1 archaic or literary nothing, nought. 2 US = NOUGHT.
adj. (usu. predic.) archaic or literary worthless; useless. bring to naught ruin; baffle. come to naught be ruined or baffled. set at naught disregard; despise.
[ OE nawiht, -wuht f. na (see NO(2)) + wiht WIGHT ]