կոյս

Probably an Iranian borrowing, but the details are uncertain. Likely from the family of Persian کس‎ (kos, “pussy”). Alternatively, from the family of Classical Persian کوسه‎ (kōsa, “man with little or no beard”).

կոյս • (koys)

1. virgin, maiden, unmarried girl

   կոյս դեռահասակ ― koys deṙahasak ― young virgin, girl, maid

2. (Christianity) the Holy Virgin
3. (astronomy) Virgo

կոյս • (koys)

1. virgin, virginal, maiden, maidenly
2. pure, chaste (of a girl or young man)
3. uncontaminated, untouched, unmingled, inviolate (of things)

   կոյս ճանապարհ ― koys čanaparh ― untrodden path

   կոյս գերեզման ― koys gerezman ― empty tomb

4. mysterious, secret, hidden (of things)

   կոյս թիւ ― koys tʿiw ― the number seven

• Armenian: կույս (kuys)
• → Georgian: კუსი (ḳusi), ყუსი (q̇usi)

• Ačaṙean, Hračʿeay (1973), “կոյս”, in Hayerēn armatakan baṙaran [Armenian Etymological Dictionary] (in Armenian), volume II, 2nd edition, a reprint of the original 1926–1935 seven-volume edition, Yerevan: University Press, page 629–630
• Awetikʿean, G.; Siwrmēlean, X.; Awgerean, M. (1836–1837), “կոյս”, in Nor baṙgirkʿ haykazean lezui [New Dictionary of the Armenian Language] (in Old Armenian), Venice: S. Lazarus Armenian Academy
• Gippert, Jost (1993) Iranica Armeno-Iberica: Studien zu den iranischen Lehnwörtern im Armenischen und Georgischen (Österreichische Akademie der Wissenschaften. Philosophisch-historische Klasse. Sitzungsberichte; 606. Veröffentlichungen der Kommission für Iranistik; 26)‎ (in German), volume I, Vienna: Verlag der Österreichischen Akademie der Wissenschaften, pages 165–166
• J̌ahukyan, Geworg (1979), “Stugabanutʿyunner [Etymologies]”, in Lraber Hasarakakan Gitutyunneri [Herald of the Social Sciences]‎ (in Armenian), issue 3, Yerevan: Academy Press, page 27 of 23–34, deriving from Hittite [script needed] (kūša-, “in-law; bride”)
• Olsen, Birgit Anette (1999) The noun in Biblical Armenian: origin and word-formation: with special emphasis on the Indo-European heritage (Trends in linguistics. Studies and monographs; 119), Berlin, New York: Mouton de Gruyter, page 298
• Pedersen, Holger (1907), “Neues und nachträgliches”, in Zeitschrift für vergleichende Sprachforschung auf dem Gebiete der Indogermanischen Sprachen‎ (in German), volume 40, issue 2, pages 197–198
• Pedersen (Pedersən), Holger (1907) Hayerēn ew dracʿi lezunerə [Armenian and the Neighbouring Languages] (in Armenian), translated into Armenian by H. Tʿovmas Ketikean, Vienna: Mekhitarist Press, page 204
• Petrosean, H. Matatʿeay V. (1879), “կոյս”, in Nor Baṙagirkʿ Hay-Angliarēn [New Dictionary Armenian–English], Venice: S. Lazarus Armenian Academy

An Iranian borrowing: compare Parthian 𐫐𐫇𐫘‎ (kws /kōs/, “district, region, countryside”), Sogdian [script needed] (kws, “side”).

կոյս • (koys)

1. side

   ընդ ո՞ր կոյս ― ənd o^?r koys ― which way? where?

   ի կուսէ անտի ― i kusē anti ― on that side or part

   յամենայն կուսաց ― yamenayn kusacʿ ― on all sides

   յոր կոյս եւ կամիցի ― yor koys ew kamicʿi ― wherever he pleases

   յայս կոյս յայն կոյս ― yays koys yayn koys ― from one side to another, on one side and the other, here and there

   զգնալ յայս կոյս եւ յայն կոյս ― zgnal yays koys ew yayn koys ― to take a walk hither and thither, to and fro

   յայս կոյս յայն կոյս գետոյն ― yays koys yayn koys getoyn ― on this side and on that of the river, here and there

   յայն կոյս ծովուն ― yayn koys covun ― beyond the sea

   ի թիկունս կոյս, յետս կոյս ― i tʿikuns koys, yets koys ― behind one's back, behind, from behind

   յարեւելից կուսէ ― yarewelicʿ kusē ― from the East

   յարեւմուտս կոյս ― yarewmuts koys ― towards the West

   ի կայս եւ ի կոյս կողմանց հիւսիսոյ ― i kays ew i koys kołmancʿ hiwsisoy ― towards the North

   ի հարաւակողմն կուսէ ― i harawakołmn kusē ― from the South

   ի մէնջ կուսէ ― i mēnǰ kusē ― for us, for our part, as for us

   ի մեր կոյս է ― i mer koys ē ― he is on our side, he is favourable to us

   ոմն ի սորա կոյս, եւ ոմն ի նորա ― omn i sora koys, ew omn i nora ― one maintained this and another that

   կոյս մի ընդ միոյ կուսին ընդհարեալ ― koys mi ənd mioy kusin əndhareal ― one side fought with the other

   ի կատարածն կոյս թղթիս ― i kataracn koys tʿłtʿis ― towards the end of my letter

   ելանել ի բացեայ կոյս ― elanel i bacʿeay koys ― to retire aside

   ի չորս կոյս վիմաց ― i čʿors koys vimacʿ ― of hewn stone

• Armenian: կույս (kuys)

• Ačaṙean, Hračʿeay (1973), “կոյս”, in Hayerēn armatakan baṙaran [Armenian Etymological Dictionary] (in Armenian), volume II, 2nd edition, a reprint of the original 1926–1935 seven-volume edition, Yerevan: University Press, page 630ab
• Awetikʿean, G.; Siwrmēlean, X.; Awgerean, M. (1836–1837), “կոյս”, in Nor baṙgirkʿ haykazean lezui [New Dictionary of the Armenian Language] (in Old Armenian), Venice: S. Lazarus Armenian Academy
• Martirosyan, Hrach (2010) Etymological Dictionary of the Armenian Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 8), Leiden, Boston: Brill, pages 370–371
• J̌ahukyan, Geworg (1995), “Hay-iranakan lezvakan zugadipumner [Armenian–Iranian Lingual Parallels]”, in Patma-banasirakan handes [Historical-Philological Journal]‎ (in Armenian), issue 2, pages 183–186
• Petrosean, H. Matatʿeay V. (1879), “կոյս”, in Nor Baṙagirkʿ Hay-Angliarēn [New Dictionary Armenian–English], Venice: S. Lazarus Armenian Academy