Somewhat airy, breezy, or having a light, insubstantial quality; lightly affecting an airy manner.
From 'airy' + '-ish' (suffix meaning 'somewhat' or 'resembling'). The '-ish' suffix allows speakers to express a degree quality rather than an absolute, making it vaguer and more subjective than 'airy.'
The '-ish' suffix is endlessly productive in English—you can add it to almost any adjective to express 'kind of, sort of, somewhat,' which is why 'airish' sounds less definite and more casual than 'airy,' capturing something between solid and truly light.
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