Heavy work mittens or gloves worn to protect hands during manual labor or in cold conditions.
Possibly from 'frim' (firm/strong) + 'mitts' (mittens), or from Low German/Frisian origins. Primarily British dialectal, referring to sturdy protective hand wear.
Regional words for hand coverings are fascinating—'frimitts' is barely known today, but it shows how working people developed specific vocabulary for tools of their trade. Most of these dialect words vanish when industrial jobs disappear.
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