غطس1 غَطَسَهُ, (S, A, K,) aor. ـِ (S, TA,) inf. n. غَطْسٌ; (S;) or ↓ غطّسهُ, (Msb,) inf. n. تَغْطِيسٌ; (TA;) or both: (A. TA;) He immersed, immerged, dipped, plunged, or sunk, him or it, in water. (S, A, Msb * K, TA.) b2:  [Hence,] ↓ غَطَّسَنِىفِى بَحْرِ انْعُمِهِ He overwhelmed me in the sea of his benefits, or favours]. (A.) A2:  غَطَسَ, aor. ـِ (Msb, K,) inf. n. غَطْسٌ, (Msb,) He, or it, became immersed, immerged, dipped, plunged, or sunk, in water or he immersed, or immerged himself, plunged, or dived, in water (Msb, * K) b2:  غَطَسَ فِى الإِنَآءِ He put his mouth into the vessel and so drank. (Ibn-'Abbád, K.) A3:  غَطَسَتْ بِهِ اللُّجَمُ Death took him away: (Sgh, K:) a dial. var. of عَطَسَتْ [q. v.]. (TA.) 2 غَطَّسَ see the preceding paragraph, in two places.6 تغاطسا They two vied, or contended, each with the other, in plunging, or diving, (A, K,) in water; (K;) syn. تَمَاقَلَا (A, K) and تَغَاطَّا (A) and تَغَامَسَا. (TA.) And تغاطسوا They vied, or contended, one with another, in plunging, or diving, in water; syn. تَغَاطُّوا. (TA.) A2:  تغاطس He feigned himself negligent, inattentive, inadvertent, inconsiderate, or heedless, not being really so; (Sgh, K;) and تغاطش is a dial. var. of the same: both are  from Aboo-Sa'eed Ed-Dareer (TA.) Yousay, تغاطس عَنْهُ He feigned himself negligent of it, &c.; (Aboo-Sa'eed, TA in art. غطش;) and [app. in like manner] تغاطسهُ. (IAar, TA in art. عمش.) غَطَّاسٌ One who dives to the bottom of water to fetch the shells that contain pearls, &c. (TA.) لَيْلٌ غَاطِسٌ Dark night: as also غَاطِشٌ. (IDrd.) مَغْطِسٌ A place in which one plunges, or dives. (TA.) مَغْنَطِيسٌ and its variations, here mentioned in the S and L and K, see in art. مغنطس.