He adopted him as a father; (
M,
K,
TA;) as also
↓
استأباهُ; (M in article
اب;) and so
تأبّاهُ أَبًا, according to A'Obeyd: (TA:) [or,] according to A'Obeyd, you say,
تَأَبَّيْتُ أَبًا
I adopted a father: (T:) and you say also,
اِسْتَأَبَّ أَبًا and
اِسْتَأْبَبَ أَبًا
he adopted a father. (
TA.)