تأسل 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.

• تأسّل Form 5

  5 تأسّل أَبَاهُ ذ , (M, K,) as also تأسّنهُ, (M, TA,) He resembled his father, (M, K, TA,) and assumed his natural dispositions; and so تَقَيَّلَهُ. (TA.) [See آسَالُ, below.]…

  View in Lane's Lexicon →