غوص1 غَاصَ فِى المَآءِ, aor. ـُ (S, A, Msb,) inf. n. غَوْصٌ (S, A, K) and مَغَاصٌ and غِيَاصَةٌ and غِيَاصٌ, (K,) He dived in, or descended beneath, the water; (S, A, K;) or entered into the water; (TA;) to fetch out what was in it. (Msb [in my copy of which, the particle فى is omitted, app. by a slip of the transcriber].) b2:  غِيَاصَةٌ [also] signifies The diving in the sea for pearls; (S;) and غَوْصٌ signifies [the same: or both signify] the fetching out pearls from beneath the water. (Mgh.) b3: [Hence,] you say also, غَاصَ عَلَى الأَمْرِ, (K,) inf. n. غَوْصٌ, (TA,) (tropical:)  [He dived for the thing, or affair, so as to elicit it; or] he knew the thing, or affair. (K, TA.) And غَاصَ عَلَى المَعَانِى حَتَّىبَلَغَ أَقْصَاهَا وَاسْتَخْرَجَ مَا بَعُدَ مِنْهَا وَدَقَّ فَهْمُهُ (tropical:)  [He dived for the meanings so that he reached the uttermost of them, and elicited what was remote of them, and the understanding whereof was subtile]. (Msb.) And فُلَانٌ يَغُوصُ عَلَى حَقَائِقِ العِلْمِ (tropical:)  [Such a one dives for the verities of science]. (A, TA.) And مَا أَحْسَنَ غَوْصَهُ عَلَيْهَا (tropical:)  [How good is his diving for them!]. (A, TA.) And مَا غَاصَ غَوْصَةً إِلَّا أَخْرَجَ دُرَّةً (tropical:)  [He did not dive a single diving but he fetched out what was like a pearl, or a large pearl]. (A, TA.) b4:  You say also, غَاصَ عَلَى الشَّىْءِ, aor. ـُ inf. n. غَوْصٌ, He pounced, or came suddenly, or at unawares, upon the thing. (Msb.) 2 غوّصهُ فِى المَآءِ He made him to dive in, or descend beneath, the water; (A;) he immersed, immerged, dipped, plunged, or sunk, him therein. (TA.) غَوْصٌ [originally an inf. n.]: see مَغَاصٌ, in two places.غَوْصَةٌ [A single diving in, or descent beneath, water: see 1, last sentence but one]. (A.) غَوَّاصٌ: see the next paragraph, in four places.غَائِصٌ One who dives in, or descends beneath, or enters into, water; as also ↓ غَوَّاصٌ [which, however, has an intensive signification, or implies the habit of so doing]: (TA:) and ↓ the latter, (S, A, K,) or both, (Az, TA,) particularly one who dives in the sea for pearls, (S, A, K,) or for pearl-shells, and fetches them out: (Az, TA:) pl. غُوَّاصٌ, (A, TA,) of the former, (TA,) and غَاصَةٌ, (A, TA,) [also of the former,] and [of the latter]غَوَّاصُونَ. (TA.) b2:  [Hence the saying,] هَوَ مِنْ صَاغَةِ الفِقَرِ وَغَاصَةِ الدُّرَرِ (tropical:)  [He is of the moulders of فِقَر, lit., as thus used, ornaments fashioned in the form of the vertebræ of the back, but here meaning choice phrases or sentences; and of the divers for, and producers of, (expressions like) pearls, or large pearls]. (A, TA.) b3:  [Hence likewise,] ↓ غَوَّاصٌ also signifies (tropical:)  One who exercises art, craft, cunning, or skill, in ordering the means of obtaining subsistence. (TA.) b4:  And غَائِصٌ also signifies One who pounces, or comes suddenly, or at unawares, upon a thing; (JK, S, Msb;) as also, (JK, Msb,) but in an intensive sense, (Msb,) ↓ غَوَّاصٌ: (JK, Msb:) pl. of the former غَاصَةٌ. (Msb.) مَغَاصٌ A place where one dives in, or descends beneath, water; (Lth, A, K;) as also ↓ غَوْصٌ: (Lth, Mgh:) or ↓ the latter signifies particularly a place [where one dives and] whence pearls are fetched out. (JK, Mgh. *) You say also, هٰذَا مَغَاصُ اللُّؤْلُؤِ This is the diving-place for pearls. (A.) b2:  Also The upper part of the سَاق [or shank, &c.]. (JK, Sgh, K.)