Emily Dickinson Lexicon

ROD'O-MONT, n. [Fr. id.; It. rodomonte, a bully; Ir. raidhmeis, silly stories, rodomontade; roithre, a babbler, a prating fellow; roithreacht, silly talk, loquacity, rhetoric; from radham, to say, tell, relate, W. adrawz. The Ir. radh, radham, are the Sax. ræd, speech, and rædan, to read. See Read. The last syllable may be the Fr. monter, to mount, and the word then signifies one that speaks loftily. Hence the name of Ariosto's hero.]

A vain boaster. – Herbert.