(س) عَلِمَ يَعْلَمُ عِلْمًاʿalima yaʿlamu ʿilman: to know, to perceive the reality of something.
عِلْمٌʿilm (also a noun, ism dhāt): knowing, knowledge. ﴿وَقُلْ رَّبِّ زِدْنِيْ عِلْمًا﴾ (Ṭā Hā 20:114)
عَالِمٌʿālim pl. عُلَمَاءُʿulamāʾu (active participle, ism fāʿil): one who knows.
عَلِيْمٌʿalīm (adjective on the pattern of فَعِيْلٌfaʿīl): one who knows always and in every respect, all-knowing. ﴿اِنَّمَا يَخْشَي اللّٰهَ مِنْ عِبَادِهِ الْعُلَمٰٓؤُا﴾ (Fāṭir 35:28)
عَالَمٌʿālam pl. عَالَمُوْنَʿālamūna: world; that by means of which something (i.e. the Creator) is known. ﴿اَلْحَمْدُ لِلّٰهِ رَبِّ الْعٰلَمِيْنَ﴾ (Al-Fātiḥah 1:2)
Form II (tafʿīl) عَلَّمَ يُعَلِّمُ تَعْلِيْمًاʿallama yuʿallimu taʿlīman: to teach, to impart knowledge. ﴿وَعَلَّمَ اٰدَمَ الْاَسْمَآءَ كُلَّهَا﴾ (Al-Baqarah 2:31); ﴿اِقْرَاْ وَرَبُّكَ الْاَكْرَمُ الَّذِيْ عَلَّمَ بِالْقَلَمِ﴾ (Al-ʿAlaq 96:3–4)