áðr

Traditionally derived from Proto-Germanic *ēdrô (“quickly, promptly”), from *ēdraz (“quick, prompt”) and thus cognate with Old English ǣdre, Old Frisian ēdre, Old Saxon ādro, Old High German ātar, but this doesn't fit well semantically. A better derivation is from Proto-Norse *āriʀ, from Proto-Germanic *airiz (“earlier”) and thus cognate with Gothic 𐌰𐌹𐍂𐌹𐌶 (airiz, “earlier”) and English ere.^[1]

• áðan

áðr (not comparable)

1. already
2. before, heretofore, ere
   • Vǫluspá, verse 46, lines 7-10, in 1860, T. Möbius, Edda Sæmundar hins fróða: mit einem Anhang zum Theil bisher ungedruckter Gedichte. Leipzig, page 7:

     […] skeggöld, skálmöld,
     skildir 'ro klofnir,
     vindöld, vargöld,
     áðr veröld steypisk; […]

     […] axe-age, sword-age,
     shields are cloven
     wind-age, wolf-age,
     ere the world falls; […]

3. until

• Icelandic: áður
• Faroese: áður
• Norwegian Nynorsk: åder

áðr

1. past participle of æja

• áðr in A Concise Dictionary of Old Icelandic, G. T. Zoëga, Clarendon Press, 1910, at Internet Archive.
• Zoëga, Geir T. (1910) A Concise Dictionary of Old Icelandic‎^[2], Oxford: Clarendon Press