شكس1 شَكِسَ, (T, S, Msb, TA,) aor. ـَ inf. n. شَكَسٌ (T, Msb, TA) and شَكَاسَةٌ; (T, S, Msb, TA;) or شَكُسَ, aor. ـُ (O, K, TA,) inf. n. شَكَاسَةٌ; (O;) He was, or became, refractory, untractable, perverse, stubborn, or obstinate, in disposition: (S, O, K:) or hard in disposition, or illnatured, in behaviour or dealing: (TA:)or evil in disposition, or illnatured, and very perverse or cross or repugnant and averse; syn. شَرِسَ. (Msb, TA. *) 3 شاكسهُ He treated him, or behaved towards him, with hardness, harshness, or illnature. (O, K.) 6 تشاكسوا They treated, or behaved towards, one another with hardness, harshness, or illnature; or disagreed, one with another; in buying or selling: (IDrd, O, TA:) or they treated, or behaved towards, one another with contrariety, or opposition. (K, * TA.) [Hence,] اللَّيْلُ وَالنَّهَارُ يَتَشَاكَسَانِ (tropical:)  The night and the day are opposed to each other: (TA:) or alternate. (Az, A, O, TA.) شَكْسٌ: see شَكِسٌ. b2:  مَحَلَّةٌ شَكْسٌ (assumed tropical:)  A strait place of alighting or abode. (TA.) A2:  الشَّكْسُ A day, or two days, before the new moon; i. q.  المُحَاقُ. (AA, O, K.) شِكْسٌ: see the next following paragraph.شَكُسٌ: see the next following paragraph.شَكِسٌ, (Fr, S, Msb, K,) or ↓ شَكْسٌ, (S,) and ↓ شَكُسٌ, (K,) the first agreeable with analogy, (S,) A man (S) refractory, untractable, perverse, stubborn, or obstinate, in disposition: (S, K:) or hard in disposition, or illnatured: (TA:) or evil in disposition, or illnatured, and very perverse or cross or repugnant and averse; syn. شَرِسٌ: (Msb:) and ↓ شِكْسٌ and ↓ مِشْكَسٌ are likewise epithets applied [in the same sense, but the latter having an intensive signification,] to a man: (IAar, TA:) pl. شُكْسٌ; (S, K;) a pl. of the first or third; (K;) or of the second, like as صُدْقٌ is pl. of صَدْقٌ. (S.) b2:  Also the first, (tropical:)  Niggardly; tenacious; avaricious. (K.) مِشْكَسٌ: see the next preceding paragraph.مُتَشَاكِسُونَ (Kur xxxix. 30) Disagreeing, one with another; (A, * K, * TA;) and behaving with hardness, harshness, or illnature: (A:) or disputing, or contending, together. (TA.) [See the verb, 6.]