فز 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.

• فَزَّ Form 1

  1 فَزَّ ذ , (A, O, K,) aor. فَزِزَ , inf. n. فَزٌّ, (TA,) He (a gazelle) was, or became, frightened, or afraid. (A, O, K.) -b2- فَزَّ قَلْبُهُ His heart heaved by reason of fear. (O.) -b3- فَزَّ عَنْهُ He (a man, O) turn…

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• فَزٌّ

  فَزٌّ ذ A light, or an active, man. (S, A, O, K.) -b2- And The offspring of the cow; (S;) [meaning,] of the wild cow: (O, K:) because of its restlessness: (TA:) pl. أَفْزَازٌ. (S, O, K.)…

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