طراه 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.

• طرّاهُ Form 2

  2 طرّاهُ ذ , inf. n. تَطْرِيَةٌ, He rendered it fresh, juicy, or moist. (K.) You say, طَرَّيْتُ الثَّوْبَ inf. n. as above, (S,) [app. meaning I refreshed, or I moistened, the garment, or piece of cloth.] -b2- And طرّى, …

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