العلم · al-ʿilm · knowledge

• Met in: V1 p2 ¶5: «وصدرت الجملة بكتاب العلم لأنه غاية المهم»
• Dictionary form: عِلْم (corpus lemma, 105 times in the Quran)
• Pattern: فِعْل (fiʿl), a verbal noun of عَلِمَ, "he knew". The same root gives عَالِم (one who knows; fāʿil pattern), عُلَمَاء (scholars; the plural in ¶1), عَلِيم (All-Knowing), تَعْلِيم (teaching) and مُعَلِّم (teacher).
• Meaning here: Knowledge in general, and above all the knowledge of the road to the Hereafter, which is the book's subject.

Ibn Faris, Maqāyīs al-Lugha, root علم, vol 4, p 109

العين واللام والميم أصل صحيح واحد، يدل على أثر بالشيء يتميز به عن غيره

One sound origin: a mark on a thing that distinguishes it from others. (So ʿalam, a sign or flag, is from the same root.)

Urdu bridge

علم, عالم, علماء and تعلیم are all everyday Urdu with the same meanings. (to be confirmed)

Quran

854 words from this root (Quranic Arabic Corpus). Most common: عَلِمَ (knew) ×382, عَلِيم (All-Knowing) ×163, عِلْم (knowledge) ×105.

فَتَعَٰلَى ٱللَّهُ ٱلْمَلِكُ ٱلْحَقُّ وَلَا تَعْجَلْ بِٱلْقُرْءَانِ مِن قَبْلِ أَن يُقْضَىٰٓ إِلَيْكَ وَحْيُهُۥ وَقُل رَّبِّ زِدْنِى عِلْمًا

So high [above all] is Allah, the Sovereign, the Truth. And, [O Muhammad], do not hasten with [recitation of] the Qur'an before its revelation is completed to you, and say, "My Lord, increase me in knowledge."

Surah Taa-Haa (20), ayah 114 · Saheeh International

Why this ayah: The Prophet ﷺ is told to ask for more knowledge.

In the Ihya

العلم: 1,983 times in the Ihya, one of its most frequent words.