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adj. fier·i·er, fier·i·est
a. Consisting of or containing fire.
b. Burning or glowing.
c. Using or effected with fire.
d. Easily ignited; flammable.
2. Having the color of fire; brightly red: fiery hair; a fiery sunset.
a. Torridly hot.
b. Feverishly hot and flushed: fiery cheeks.
c. Being in an inflamed, usually painful condition: a fiery boil.
a. Easily excited or emotionally volatile; tempestuous: a fiery temper.
b. Charged with emotion; spirited: a fiery denunciation.
[Middle English firi, from fir, fire; see fire.]