An extremely obscure or possibly obsolete term; likely refers to someone associated with a hall or possibly a specialized worker or craftsperson.
Possibly compound of 'hall' plus a suffix like '-cist' or '-ist,' but the exact etymology and meaning are highly uncertain and the word appears virtually nowhere in historical texts.
This might be one of those ultra-rare words that linguists only find once in some obscure medieval manuscript—every field had specialized workers, and 'hallcist' might be one we've almost completely forgotten!
Complete word intelligence in one call. Free tier — 50 lookups/day.