قنأ doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 2 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• قَنَأَ Form 1

  1 قَنَأَ ذ , aor. قَنَاَ , inf. n. قُنُوْءٌ, It (a thing, TA) was, or became, intensely red: (K:) and قَنَا, without ء, is a dial. var. thereof, (TA in this art.,) aor. يَقْنُو, inf. n. قُنُوٌّ. (TA in art. قنو.) You say…

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• قنّأ Form 2

  2 قنّأ ذ , (S, O, K,) inf. n. تَقْنِئَةٌ, (S, O,) or تَقْنِىْءٌ, (K,) He rendered (S, O, K) a thing, (K,) or his beard, (S, O,) intensely red (S, O, * K) with dye. (S, O.) And He dyed his beard black; as also . (K.)…

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