ائتسى
Root: اسو
Form: 8
Full Definition
ائتسىVIII
[written with the disjunctive alif اِيتَسَى] He imitated him; followed his example; did as he did, following his example, or taking him as an example, an exemplar, a pattern, or an object of imitation; he took example by him; as also تأسّى بِهِ: he made him an object of imitation (إِسْوَة) [to himself]. One says لَا تَأْتَسِ بِمَنْ, لَيْسَ لَكَ بِإِسْوَةٍ
Do not thou imitate him who is not for thee a [fit] object of imitation.