furibund
Having a propensity to be furious; choleric, irate.
literary
Fie, frantike, fabulators, furibund, and fatuate, / Out, oblatrant, oblict, obstacle, and obsecate.
Where it comes from
From French furibond (“furious”) and Middle English furybound, furybounde, both borrowed from Latin furibundus (“frantic, frenzied; maddened, raving; inspired”), from furō (“to rave, rage”) + -bundus (suffix forming adjectives with an active or transitive meaning). The further etymology of furō is uncertain; a derivation from Proto-Indo-European *dʰewh₂- (“smoke; haze, mist”) has been suggested.
Adapted from the Wiktionary entry furibund (CC BY-SA 4.0).