Superlative form of 'fiery'; the most fiery, passionate, hot, or intense in a group or comparison.
From 'fiery' with the superlative suffix -est (from Old English -ast/-ost). The -est suffix marks the extreme degree of an adjective, used when comparing three or more items.
English's -est suffix is ancient and productive—we apply it automatically to new adjectives (the 'viralest' video, the 'memeiest' post). This productivity shows how inflectional systems continue evolving even after 1,500 years of language change.
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