Somewhat large or fairly big, but not huge; moderately sized.
English 'big' + diminutive suffix '-ish' (from Old Norse 'iska'). The suffix -ish creates a softer, less absolute version of the root word, allowing for approximation rather than precision.
The suffix '-ish' is one of English's most playful tools—it lets speakers hedge their bets linguistically. 'Biggish' is delightfully vague because it means different things depending on context: a biggish pizza is different from a biggish elephant, which is why poets and everyday speakers love it.
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