“Khawf produces movement, khashya produces stillness.”

“Qalb turns, fu'ād flames, ṣadr expands, lubb is the kernel.”

“Zanb leaves a trace, ithm blocks the path, fāḥisha is excess, jurm is severance.”

“Maṭar mostly appears in punishment contexts; ghayth in every occurrence in mercy contexts.”

“Singular 'rīḥ' mostly appears in adverse, destructive contexts; plural 'riyāḥ' mostly in contexts of mercy and blessing.”

“Hellfire has 6 names — each emphasizes a different dimension of punishment.”

“Insān is the social/thinking being, bashar the biological/physical being.”

“Each 'child' word names a different age/state.”

“Qawm is origin, umma ideal/religion, shaʿb large nation, qabīla lineage sub-unit.”

“Khalq is measured, ibdā' without precedent, faṭr the original split, bad' is initiating.”

“Anzala is wholesale descent, nazzala gradual descent.”

“Rizq is material-spiritual base, niʿma recognized goodness, faḍl unmerited grace.”

“ʿIlm is broad, maʿrifa specific, shuʿūr sensing, dirāya deep comprehension.”

“Tafakkur is mental; tadabbur outcome-oriented; tadhakkur recall; ʿaql reasoning.”

“ʿIlm al-yaqīn is by report, ʿayn al-yaqīn by sight, ḥaqq al-yaqīn by experience.”

“Ṣirāṭ is always singular (the one true path), sabīl can be plural (many paths).”

“Ḥayāh is the essence of life, dunyā 'nearer life', ākhira 'latter life' — appear with equal frequency.”

“Janna is general garden, Firdaws highest, ʿAdn eternal, Naʿīm emphasizes delight.”

“Khayr is general good, ṣalāḥ structural soundness, birr attentive goodness, maʿrūf recognized good.”

“Naṣr is victory-help, ʿawn support, ta'yīd reinforcement, madd extension.”

“Waṣṣā (repeated counsel) is used for religious/moral instruction, awṣā (single-instance ruling) for legal commands — with exactly one exception: the infant Jesus.”