Inclined to guffaw; characterized by loud, hearty laughter or resembling a guffaw in sound or manner.
Formed from guffaw with the addition of the adjective suffix '-y', meaning 'having the quality of' or 'inclined toward'.
The '-y' suffix is magical in English—add it to any noun and you can describe something as having that quality, which is why we can call someone guffy (full of guffaws) or someone spiky (full of spikes).
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