наустник

• IPA^(key): [nɐˈusnik]
• Rhymes: -usnik
• Syllabification^(key): на‧у‧стник
• Hyphenation^(key): на‧ус‧тник

Instrumental noun from на- (na-, “on”) +‎ уста́ (ustá, “mouth”) +‎ -ник (-nik).

нау́стник • (naústnik) m

1. (technical) mouthpiece (the part of a device that is put onto one's mouth)

• “наустник¹”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• “наустник”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010

Agent noun of нау́стя (naústja, “to instigate”) +‎ -ник (-nik).

нау́стник • (naústnik) m (feminine нау́стница)

1. male instigator, provoker

• “наустник²”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• Nayden Gerov (1899), “нау́стникъ”, 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 239

Instrumental noun of наустя́ (naustjá, “to learn word by word”) +‎ -ник (-nik). Formally, identical to Etymology 1.

нау́стник • (naústnik) m (obsolete)

1. alternative form of нау́стница (naústnica, “breviary”) (collection of prayers that need to be recited at a regular interval)

   Synonym: часосло́в (časoslóv)

• Georgiev, Vladimir I., Duridanov, I. V., editors (1995), “наусник”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 4 (мѝнго² – па̀дам), Sofia: Prof. Marin Drinov Pubg. House, →ISBN, page 562