Lafzlar (so'zlar) ma'nolarni bildirish uchun tilda mavjud. Bitta lafz bitta ma'noni bildirishi mumkin, masalan: "Baghdaad" so'zi o'z nomi bilan tanilgan shaharning ma'nosini ko'rsatadi. Lafz bir nechta ma'noni ham bildirishi mumkin, masalan: "Ain" (ko'z) so'zi suvning manbai (buloq), ko'radigan ko'z va josus kabi bir qancha ma'nolarni ko'rsatadi. Lafz ikki yoki undan ortiq ma'noni ham bildirishi mumkin, masalan: "Ar-Rijaal" (erkaklar) so'zi "Ar-Rajul" (erkak) sifati to'liq amalga oshgan har bir kishini bildiradi, shuningdek, o'z turi (jins) ichida keng tarqalgan bildirilgan ma'noni (madlool) ko'rsatishi mumkin, masalan: "Rajul" (erkak).

Alfaazh (wordings) have been provided within the language to indicate meanings. The single Lafzh can indicate one single meaning like: ‘Baghdaad’ is indicative of the meaning of the city that is known by its name. A Lafzh can also indicate many meanings like: ‘Ain’ (eye) which is indicative of the meaning of the ‘Ain of water (spring), the ‘Ain that sees (eye) and the spy amongst other meanings. The Lafzh can also be indicative of two meanings or more like the Lafzh ‘Ar-Rijaal’ (men) as it is indicative of everyone within whom the description of ‘Ar-Rajul’ (man) is realised and it could also indicate to an indicated meaning (Madlool) that is widespread within its type (Jins) like: ‘Rajul’ (A man).

Shu tariqada berilgan alfoz (so'zlar va iboralar) asosida ular umumiylik yoki umumiy emaslik jihatidan bir qator toifalarga bo'lingan, ular quyidagilar: Al-'Aamm, Al-Khaass, Al-Mushtarak, Al-Mutlaq va Al-Muqayyad.

Based upon this way that the Alfaazh (worded expressions) have been provided and set, the Alfaazh have been divided in respect to their comprehensiveness or lack of comprehensiveness into a number of categories which are: Al-‘Aamm, Al-Khaass, Al-Mushtarak, Al-Mutlaq and Al-Muqayyad.