رهج4 ارهج, (K,) or ارهج الغُبَارَ, (S, Mgh,) He, or it, raised the dust. (S, Mgh, K.) You say, أَرْهَجَتْ حَوَافِرُ الخَيْلِ The hoofs of the horses raised the dust. (A.) b2:  [Hence, because a heavy rain raises the dust,] ارهجت السَّمَآءُ (tropical:)  The sky poured, or flowed, with rain. (A, K.) b3:  And ارهج بَيْنَهُمْ (tropical:)  He raised, or excited, conflict and faction, or sedition, or discord or dissension, between them, or among them. (A.) b4:  And ارهجوا فِى الكَلَامِ وَالصَّخَبِ (tropical:)  [They raised a tumult in talking and clamouring]. (A.) b5:  And ارهج He had in his house, or chamber, much بَخُور [or incense]. (IAar, K.) رَهْجٌ: see what next follows.رَهَجٌ (S, A, Mgh, K) and ↓ رَهْجٌ (K) Dust, syn. غُبَارٌ, (S, A, Mgh, K,) raised. (Mgh.) In the phrase عَلَيْهِ رَهَجُ الغُبَارِ [Upon him, or it, is raised dust], الغبار is subjoined by way of explanation. (Mgh.) It is said in a trad., مَنْ دَخَلَ جَوْفَهُ الرَّهَجُ لَمْ يَدْخُلْهُ حَرُّ النَّارِ [He into whose inside the dust raised in fighting in the cause of God has entered, the heat of the fire of Hell will not enter it]. (TA. [The meaning is shown by another trad. there cited.]) b2:  Also, (K,) or the former word, (TA,) Clouds, (K,) or thin clouds, (TA:) without water, (K,) resembling dust: (TA:) n. un. with ة. (K.) b3:  Also, (K,) or the former word, (TA,) (tropical:)  Excitement of evil or mischief, of conflict and faction, of sedition, or of discord or dissension. (IAar, L, K, TA.) رُهْجُوجٌ: see what next follows.رِهْجِيجٌ Weak; (K;) applied to a young weaned camel; (TA;) or to a man and an animal [of any kind]: (TK:) and soft; as also ↓ رُهْجُوجٌ, (K,) with damm; (TA; in the CK [erroneously]رَهْجُوج;) applied to a man. (TK.) مَشْىٌ رَهْوَجٌ (S) An easy, gentle, pace: (TA:) the latter app. a Pers\. word, arabicized; (S;) [from رَهْوَا or رَهْوَارْ, or] its Pers\. original is رَهْوَهْ. (L.) رَهْوَجَةٌ A certain [easy] kind of pace. (S, K.) نَوْءٌ مُرْهِجٌ (tropical:)  [A star, or an asterism, of the Mansions of the Moon, or of any that were believed to bring rain,] attended by much rain [as though it raised the dust]. (A, K.)