ک س بk-s-b
(ض) كَسَبَ يَكْسِبُ كَسْبًاkasaba yaksibu kasban: to obtain a thing by effort, to earn; to do (a good or bad) deed. ﴿كُلُّ امْرِئٍۢ بِمَا كَسَبَ رَهِيْنٌ﴾ (Aṭ-Ṭūr 52:21); ﴿مَآ اَغْنٰى عَنْهُ مَالُهُۥ وَمَا كَسَبَ﴾ (Al-Masad 111:2)
Form VIII (iftiʿāl) اِكْتَسَبَ يَكْتَسِبُ اِكْتِسَابًاiktasaba yaktasibu iktisāban: to earn with deliberate effort. ﴿لَهَا مَا كَسَبَتْ وَعَلَيْهَا مَا اكْتَسَبَتْ﴾ (Al-Baqarah 2:286)Note: in this verse the bare form «كَسَبَتْkasabat» is used for good and «اكْتَسَبَتْaktasabat» for evil, meaning that evil is taken to account only when intention and deliberate effort are involved in it.