Past tense and past participle of 'fiercen'; made more fierce or intense.
Regular past tense formation from 'fiercen' using the standard English -ed suffix, added to the verb stem. This is the most common way English marks past tense (over 90% of verbs).
Most English verbs follow this 'add -ed' pattern, making it the most predictable rule in the language. But the fact that we have over 200 irregular verbs (went, ran, saw) shows how these exceptions survive from Old English despite 1,000+ years of language change.
Complete word intelligence in one call. Free tier — 50 lookups/day.