безмѣнъ

Unknown, attested from the late 14th century, which is after the Mongol invasion, so probably folk-etymologically altered after без- (bez-) +‎ мѣна (měna) and a Turkic rendering of Arabic وَزْنَة (wazna), as most Slavic languages also have Arabic قِنْطَار (qinṭār) via Turkic to denote the steelyard, both originally units of weight. Compare Old Polish bezmian.

безмѣнъ (bezměnŭ) m

1. stilyard

• Russian: безме́н (bezmén)
  • → Georgian: ბაზმანდი (bazmandi)
  • → Armenian: բեզմեն (bezmen)
• Ukrainian: бе́змін (bézmin), бе́змен (bézmen), бедзвін (bedzvin), бедзмін (bedzmin), безмір (bezmir), безьман (bezʹman), безьмін (bezʹmin), безьмин (bezʹmyn) — dialectal
• → Middle Low German: besemer, bisemer, bismer, bysmer, besmere
  • Low German: Besmer, Bismer, Besemer
  • → Middle High German: besemer, bisemer (rare)
  • → German: Besemer, Besmer
  • → Old Norse: bismari
    • Danish: bismer
      • → Greenlandic: bismeri
    • Faroese: bismari
    • Swedish: besman, betsman, dialectally besmar, besmal, bismål, bismere, besmir, bysmär, bissmid etc. (probably reborrowed on multiple occasions)
• → Latvian: bezmēns, vezmēns
• → Lithuanian: bezmė̃nas

• Bismere in Johan Ernst Rietz, Svenskt dialektlexikon (1862–1867)
• Vasmer, Max (1964–1973) “безме́н”, in Oleg Trubachyov, transl., Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), Moscow: Progress

безмѣ́нъ • (bezmě́n) m inan (genitive безмѣ́на, nominative plural безмѣ́ны, genitive plural безмѣ́новъ)

1. Pre-1918 spelling of безме́н (bezmén, “stilyard”).