The quality of being fumish; the state of being somewhat like fumes or producing fume-like qualities (archaic/rare).
From 'fumish' plus the abstract noun suffix '-ness,' creating a noun to describe the quality of being somewhat fume-like.
Words like 'fumishness' reveal how Middle English writers were obsessed with creating precise gradations—not just 'smoky' but 'somewhat smoky-ish' and its quality called 'fumishness'—eventually leading to modern words like 'almost.'
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