Somewhat like or characteristic of a gamin or gamine; having qualities of a street child or displaying playful, impudent behavior.
From 'gamin' with the adjectival suffix '-ish'; the '-ish' suffix means 'somewhat like' or 'having qualities of,' as in 'clownish' or 'foolish.'
The suffix '-ish' is perfect for nuance—'gaminish' means you're not fully a gamine but you've got those mischievous, youthful vibes going on, like a regular person having a playful day.
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