Emily Dickinson Lexicon

VAUNT, v.i.¹ [Fr. vanter; It. vantarsi, from vanto, a boasting, from vano, vain, L. vanus. This ought to be written vant.]

To boast; to make a vain display of one's own worth, attainments or decorations; to talk with vain ostentation; to brag. Pride … prompts a man to vaunt and overvalue what he is. – Gov. of the Tongue.