издавна

Formed from the ancestor of из (iz, “from”) + the genitive of Proto-Slavic *davьnъ (“ancient, past”).

изда́вна • (izdávna) (no comparative)

1. (archaic) since long ago

• недавна (nedavna, “not long ago”) (archaic)
• отдавна (otdavna, “long ago”)

• издавна in Rečnik na bǎlgarskija ezik (Institut za bǎlgarski ezik)
• Georgiev V. I., editor (1971), “давно”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 1, Sofia: Bulgarian Academy of Sciences, page 312

• IPA^(key): [ˈizdəvnə]

и́здавна • (ízdavna)

1. long since; since long ago

• давно́ (davnó)