To make something completely dull or to dull something thoroughly.
Combines the intensive prefix 'for-' with 'dull.' This appears in early English texts as a way to express total dulling or making completely unresponsive.
This word captures a moment when English speakers were still freely adding 'for-' to almost any verb—'fordull,' 'forbrighten,' 'forsoften'—before the language standardized and we lost this creative flexibility.
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