1 رَجَسَتِ السَّمَآءُ  , (S, A, K,) aor. رَجُسَ , (S,) inf. n. رَجْسٌ, (S, A,) The sky thundered vehemently, (S, A, K,) and became in a state of commotion (S, K) preparatory to rain; (TA;) as also ↓ ارتجست . (S, A, K, * TA.) ― -b2- رَجَسَ البَعِيرُ, (K,) inf. n. as above, (A, TA,) The camel brayed: (K:) or made a vehement noise in braying. (A, * TA.) ― -b3- And رَجَسَ, inf. n. as above and رَجْسَةٌ and رَجَسَانٌ, It (a confused and great thing, such as an army, and a torrent, and thunder,) made a sound or noise; as also ↓ ارتجس . (TA: [but in this sense, only the inf. ns. are mentioned, and رَجْسَةٌ is probably an inf. n. of un.]) -A2- رَجَسَ, (K,) inf. n. رَجْسٌ, (TA,) He measured [the depth of] the water of a well with the مِرْجَاس; (K, * TA;) as also ↓ ارجس , (K,) inf. n. إِِرْجَاسٌ. (TA.) -A3- رَجَسَهُ عِنِ الأَمْرِ, aor. ُ and رَجِسَ , (O, K,) inf. n. رَجْسٌ, (O, TA,) He hindered, withheld, or prevented, him from doing the thing. (O, K.) -A4- رَجِسَ, aor. رَجَسَ , inf. n. رَجَسٌ; (Msb;) and رَجُسَ, aor. رَجُسَ , inf. n. رَجَاسَةٌ; (A, Msb, TA;) It (a thing) was, or became, unclean, dirty, or filthy: (A, Msb, TA:) or stinking: or disliked, or hated, for its uncleanness, dirtiness, or filthiness. (Msb.) ― -b2- And both these verbs, (K,) inf. n. of the former, (TA,) and of the latter, (K,) as above, (K, TA,) He did a bad, an evil, an abominable, or a foul, action. (K, TA.) 4 أَرْجَسَ see 1. 8 ارتجس  : see 1, in two places. ― -b2- Also It (a building) became in a state of commotion, (K, TA,) so as to make a sound, or noise. (TA.) رِجْسٌ  Uncleanness, dirt, or filth: or an unclean, a dirty, or a filthy, thing: syn. قَذَرٌ: (S, A, Msb, K, TA: [in the CK, القَدَرُ is put by mistake for القَذَرٌ:]) or شَىْءٌ قَذِرٌ: (TA:) anything that is disliked, or hated, for its uncleanness, dirtiness, or filthiness: stink, or foul odour: accord. to Az, filth that comes forth from the body of a man: En-Nakkásh says that it is syn. with نِجْسٌ; and it is said in the Bári' that sometimes they say الرَّجَاسَةُ وَالنَّجَاسَةُ, meaning that they make these two words syn.: (Msb:) it is also written ↓ رَجِسٌ and ↓ رَجَسٌ : (A, K:) you say رِجْسٌ نِجْسٌ, and رَجِسٌ نَجِسٌ; and IDrd says, I think that they also said رَجَسٌ نَجَسٌ: Pr says that when رجس is followed by نجس, the ج is with kesr; but when نجس is mentioned without رجس, the ج and ن are with fet-h. (TA.) You say also شَىْءٌ رِجْسٌ [An unclean, a dirty, or a filthy, thing]. (A.) And ↓ مَرَّبِنَا جَمَاعَةٌ رَجِسُونَ نَجِسُونَ, meaning, A company of unbelievers passed by us. (IAar and TA.) As used in the Kur vi. 125, Mujáhid explains الرِّجْس as meaning That in which is no good. (TA.) ― -b2- Any action that is disliked, or hated, for its uncleanness, dirtiness, or filthiness: (Zj, A, K:) a sin, or crime: (Ibn-El-Kelbee, A, K:) so in the Kur v. 92, and vi. 146: (Ibn-El-Kelbee:) an action that leads to punishment: (T, A, K:) as رَجْسٌ signifies “ vehemence of sound, ” [see 1,] رِجْسٌ seems to mean an action the mention whereof is evil, and highly evil: (TA:) sometimes it signifies a thing that is unlawful, or forbidden: and unbelief: infidelity: (L:) and doubt: (Aboo-Jaafar, A, K:) so in the Kur xxxiii. 33. (Aboo-Jaafar.) ― -b3- (assumed tropical:) Punishment; (Fr, T, S, A, K;) a sense which Z makes tropical, as being the recompense of رِجْس [in the sense of “ sin ”], (TA;) and anger: (Fr, S, A, K:) so in the Kur x. 100: like رِجْزٌ, which is perhaps formed from it by the change of س into ز: (Fr, S:) and sometimes, malediction, or execration. (L.) -A2- A light, or slight, motion. (TA.) -A3- Suggestion of the devil. (TA.) رَجَسٌ : see رِجْسٌ; the latter, in two places. رَجِسٌ  : see رِجْسٌ; the latter, in two places. رَجُوسٌ : see رَاجِسٌ; the latter, in three places. رَجَّاسٌ  : see رَاجِسٌ; the latter, in three places. رَاجِسٌ  and ↓ مُرْتَجِسٌ (A, K) and ↓ رَجَّاسٌ (S, A, K) A cloud making a loud, or vehement, sound; (S, A, K, TA;) and so thunder. (TA.) You say, [of a cloud,] هٰذَا رَاجِسٌ حَسَنٌ This is a goodly thunderer. (S.) And عَفَتِ الدِّيَارَ الغَمَائِمُ الرَّوَاجِسُ وَالرِّيَاحُ الرَّوَامِسُ [The loudthundering clouds and the dust-spreading winds effaced the traces of the dwellings]. (A.) ― -b2- [And in like manner,] ↓ رَجَّاسٌ (S, K) and ↓ رَجُوسٌ and ↓ مِرْجَسٌ (K) A camel that brays vehemently. (S, K, * TA.) You say also الحَنِينِ ↓ نَاقَةٌ رَجْسَآءُ , [fem. of ↓ أَرْجَسُ ,] A she-camel that utters the [yearning cry termed] حَنِين consecutively, or continuously. (IAar, TA.) ― -b3- [And hence,] ↓ الرَجَّاسُ The sea: (K:) because of the sound of its waves; or because of its commotion. (TA.) -A2- رَاجِسٌ also signifies The thrower of the مِرْجَاس; (K;) and so ↓ مُرْجِسٌ . (TA.) أَرْجَسُ ذ ; and its fem. رَجْسَآءُ: see رَاجِسٌ. مُرْجِسٌ  : see رَاجِسٌ, last sentence. مِرْجَسٌ ذ : see رَاجِسٌ. مِرْجَاسٌ ذ A stone which is tied to the end of a rope, and which is then let down into a well, and stirs up its black mud, after which the water is drawn forth, and thus the well is cleansed: (S, K: *) or a stone which is thrown into a well in order that one may know, by the sound thereof, its depth; or that one may know whether there be in it water or not: (IAar, K:) or, accord. to ISd, the name by which this is known is مِرْدَاسٌ. (TA.) إِِنَّهُ لَرِجْسٌ مَرْجُوسٌ ذ and رجل مَرْجُوسٌ [are phrases mentioned, but not explained, in the TA: but I think that رجل is a mistranscription for رِجْزٌ; and that مرجوس, in each case, is a corroborative]. هُمْ فِى مَرْجُوسَةٍ  , (S, A, K,) and ↓ فى مَرْجُوسَآءَ , (TA,) They are in a state of confusion (S, A, K) and perturbation, (A,) مِنْ أَمْرِهِمْ in respect of their affair, or case. (S, TA.) مَرْجُوسَآءُ  : see what next precedes. مُرْتَجِسٌ  : see رَاجِسٌ. نَرْجِسٌ  (S, Msb, K) and نِرْجِسٌ (AA, Sgh, Msb, K) [The narcissus;] a certain sweet-smelling flower, (Msb, * TA,) well known: (Msb, K:) the smell of which is beneficial for the cold rheum and the cold headache: (K:) the word is arabicized, (S, Msb, TA,) from [the Persian] نَرْگِسْ: (TA:) [this being the case, the ن should be regarded as radical it is said, however, that] the ن in نَرْجِسٌ is augmentative, because there is no word of the measure فَعْلِلٌ, but there is of the measure نَفْعِلٌ, (S,) though only what is changed, in application, from a verb: (Msb:) but نِرْجِسٌ is of the measure فِعْلِلُ; (TA;) or it is of the measure نِفْعِلٌ, the augmentative letter being made to accord in its vowel with the radical letter in إِِذْخِرٌ and that in إِِثْمِدٌ &c.: (Msb:) or, accord. to IDrd, نَرْجِسٌ is of the measure فَعْلِلٌ, and the only instance of that measure. (TA in art. نرجس.) If you name a man نَرْجِس, you make it imperfectly decl., because it is like نَضْرِبُ: (S:) but if you name him نِرْجِس, it is perfectly decl., because it is of the measure فِعْلِلٌ (TA) [or نِفْعِلٌ, neither of which is the measure of a verb]. ― -b2- نَرْجِسُ المَائِدَةِ: see زُمَاوَرْدٌ. Credit: Lane Lexicon