A variant or archaic spelling of 'forrel,' a type of metal band or ferrule used to strengthen or bind something; a metal ring or binding.
From Old French 'virole' (ferrule), ultimately from Latin 'viriola' (little bracelet). The word shifted through various spellings in Middle English, with 'forrel' being one variant that eventually became modern 'ferrule.'
The word 'ferrule' for the metal tip on a pencil or umbrella traces back to the Latin word for 'bracelet'—so your pencil is literally wearing a tiny decorative Roman bracelet on its end.
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