Somewhat like a dunce; showing signs of stupidity, foolishness, or ignorance.
From 'dunce' with the suffix '-ish,' which creates adjectives meaning 'somewhat' or 'having the quality of' (as in 'foolish,' 'childish,' 'yellowish'). The '-ish' suffix comes from Old English and Germanic roots.
The '-ish' suffix is one of English's most casual word-builders—'duncish' sounds less harsh than 'stupid,' like you're affectionately teasing someone rather than seriously insulting them.
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