انطلق 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.

• انطلق Form 7

  7 انطلق ذ , inf. n. اِنْطِلَاقٌ, of which the dim. is , the conjunctive ا being rejected, so that it becomes نِطْلَاقٌ, (S, O,) [He was, or became, loosed from his bond: whence,] اِنْطِلَاقُ العِنَانِ [The rein's being l…

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