Somewhat dun in color; having a dull grayish-brown tone or a rather dull appearance.
From 'dun' plus the English suffix '-ish' (meaning somewhat or rather). This formation follows the productive pattern of -ish adjectives that allow speakers to modify color descriptions and qualities with more subtlety.
The suffix '-ish' is one of English's most forgiving tools—it lets you hedge your bets and say 'kind of, sort of, maybe' about any description, which is probably why British English speakers love words like 'dunnish' and 'bluish' for those moments when precision feels like overkill.
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