تطيب doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• تطيّب Form 5

  5 تطيّب ذ [quasi-pass. of 2, as such signifying It became, or was made or rendered, good, pleasant, &c.: and] he perfumed himself, or made himself fragrant, (A, Msb, TA,) بِالطِّيبِ [with perfume], (Msb,) or بِالشِّىْءِ …

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