Bulgarian Wikipedia has an article on:

Луна

Wikipedia ^bg

Inherited from Old Church Slavonic лоуна (luna), from Proto-Slavic *luna.

• IPA^(key):

• Audio:

  (file)

• Rhymes: -na

луна́ • (luná) f (relational adjective лу́нен, diminutive луни́ца)

1. moon (the Moon, the satellite of planet Earth)

   Synonym: месечи́на (mesečína)

2. moon (any substantially sized natural satellite of a planet)

• “луна¹”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• “луна”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010
• Georgiev, Vladimir I., editor (1986), “луна́¹”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 3 (крес¹ – мѝнго¹), Sofia: Bulgarian Academy of Sciences Pubg. House, page 509

Back-formed (with stress retraction) from the diminutive луни́ца (luníca, “small moon”) of Etymology 1.

• IPA^(key):

• Audio:

  (file)

лу́на • (lúna) f (relational adjective луни́в or лу́нест)

1. freckle, speckle, skin spot

   Synonym: (dialectal) пе́га (péga)

• лу́ня се (lúnja se), луня́свам (lunjásvam, “to get speckles on the skin”)
• лу́нка (lúnka), лу́ница (lúnica), лу́ничка (lúnička) (diminutive)

• “луна²”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• Nayden Gerov (1899) “лу́на”, in Рѣчникъ на Блъгарскꙑй язꙑкъ. Съ тлъкувание рѣчи-тꙑ на Блъгарскꙑ и на Русскꙑ. [Dictionary of the Bulgarian language]‎ (in Bulgarian), volume 3, Plovdiv: Дружествена печꙗтница "Съгласие.", page 24
• Georgiev, Vladimir I., editor (1986), “лу́на¹”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 3 (крес¹ – мѝнго¹), Sofia: Bulgarian Academy of Sciences Pubg. House, page 508

Probably a resultant noun of lost Proto-Slavic *lu- (“thrust, poke”) +‎ -на (-na), attested with s-mobile in Bulgarian хлу́я (hlúja, “to raid, to charge in”). If correct, then related to Serbo-Croatian олу́ја (“whirlwind”).

• IPA^(key):

• Audio:

  (file)

лу́на • (lúna) f (relational adjective лу́няв)

1. (dialectal) strong gale, squall

• лу́ня (lúnja) — dialectal

• Georgiev, Vladimir I., editor (1986), “лу́на⁴”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 3 (крес¹ – мѝнго¹), Sofia: Bulgarian Academy of Sciences Pubg. House, page 508

• улна (ulna), нула (nula)

Inherited from Proto-Slavic *luna.

• IPA^(key):

луна • (luna) f

1. (rare, poetic) moon (the Moon, the satellite of planet Earth)

   Synonym: месечина (mesečina)

2. Alternative form of луња (lunja, “thunderstorm”)

Inherited from Proto-Slavic *lunà, from Proto-Balto-Slavic *láukšnāˀ, from Proto-Indo-European *lówksneh₂.

• Hyphenation: лу‧на

луна (luna) f

1. moon

• Russian: луна́ (luná)
• Ukrainian: луна́ (luná, “echo”)

• Sreznevsky, Izmail I. (1902) “луна”, in Матеріалы для Словаря древне-русскаго языка по письменнымъ памятникамъ [Materials for the Dictionary of the Old East Slavic Language Based on Written Monuments]‎ (in Russian), volume 2 (Л – П), Saint Petersburg: Department of Russian Language and Literature of the Imperial Academy of Sciences, column 54

Russian Wikipedia has an article on:

луна

Wikipedia ^ru

Inherited from Old East Slavic луна (luna, “moon”), from Proto-Slavic *luna (“moon”).

• IPA^(key):

• Audio:

  (file)

• Rhymes: -a

луна́ • (luná) f inan (genitive луны́, nominative plural лу́ны, genitive plural лун, relational adjective лу́нный)

1. moon (the Moon, the satellite of planet Earth)
   • 2007, Земфира [Zemfira], “Мы разбиваемся [My razbivajemsja]”, in Спасибо‎:

     Звонки́ телефо́нные под луно́й,
     Грани́цы усло́вные, я с тобо́й...

     Zvonkí telefónnyje pod lunój,
     Granícy uslóvnyje, ja s tobój...

     (please add an English translation of this quotation)

2. moon (any substantially sized natural satellite of a planet)

1. Луна́ f (Luná), ме́сяц m (mésjac)
2. есте́ственный спу́тник m (jestéstvennyj spútnik)

• небе́сное те́ло n (nebésnoje télo), спу́тник m (spútnik)

• безлу́нный (bezlúnnyj)
• прилуни́ться pf (prilunítʹsja), прилуня́ться impf (prilunjátʹsja), прилуне́ние n (prilunénije)

Compound words:

Compounds:

• From лу́нный (lúnnyj):
  • лу́нное затме́ние n (lúnnoje zatménije)

Phrases

• выть на луну́ impf (vytʹ na lunú)
• как до Луны́ (kak do Luný)
  • как до Луны́ пешко́м (kak do Luný peškóm)

Borrowed

Native

• лоск m (losk)
• луч m (luč)
• лысый (lysyj)

• Vasmer, Max (1964–1973) “луна”, in Oleg Trubachyov, transl., Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), Moscow: Progress
• Chernykh, P. Ja. (1999) “луна”, in Историко-этимологический словарь русского языка [Historical-Etymological Dictionary of the Russian Language] (in Russian), 3rd edition, volume 1 (а – пантомима), Moscow: Russian Lang., →ISBN, page 495
• Shansky, N. M., Zhuravlyov, A. F., editors (1999), “луна”, in Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), number 9 (Л), Moscow: Moscow University Press, →ISBN Invalid ISBN, page 188

• Dal, Vladimir (1880–1882) “луна”, in Толковый Словарь живаго великорускаго языка [Explanatory Dictionary of the Living Great Russian Language] (in Russian), 2nd edition, Publication of the bookseller-typographer Wolf, M. O.

Ukrainian Wikipedia has an article on:

луна (акустичне явище)

Wikipedia ^uk

• IPA^(key):

• Audio:

  (file)

луна́ • (luná) f inan (genitive луни́, uncountable)

1. echo (reflected sound)

• Bilodid, I. K., editor (1970–1980), “луна”, in Словник української мови: в 11 т. [Dictionary of the Ukrainian Language: in 11 vols] (in Ukrainian), Kyiv: Naukova Dumka
• “луна”, in Горох – Словозміна (in Ukrainian)