Emily Dickinson Lexicon

FROTH, n. [frauth; Gr. αφρος; Sw. fradga. It is allied perhaps to G. brausen, to roar, fret, froth; Ir. bruithim, to boil; W. brydiaw, to heat.]

1. Spume; foam; the bubbles caused in liquors by fermentation or agitation. Bacon. Milton.
2. Any empty, senseless show of wit or eloquence. Johnson.
3. Light, unsubstantial matter. Tusser.