An archaic or dialectal term for the head or skull, sometimes used to denote a wise or old person (a grey-head).
From Old English or Middle English, possibly related to 'grey' and '-ard' (suffix denoting someone with a characteristic); may connect to 'griz' meaning grey-haired.
Old English speakers used '-ard' to create words for people with distinctive traits—just like 'drunkard' or 'sluggard'—so 'grizard' was their term for a wise old grey-haired person.
Complete word intelligence in one call. Free tier — 50 lookups/day.