Past tense of guffaw; laughed loudly and boisterously in an unrestrained manner.
Regular past tense formation from the verb guffaw, formed by adding the '-ed' suffix standard to English verbs.
Every time someone writes 'he guffawed,' they're using a word that's probably less than 500 years old—proving that English is constantly creating new words for new feelings and situations.
Complete word intelligence in one call. Free tier — 50 lookups/day.