um búizk áðr

Hi Sarah,

Hope you got my postings.

Re this fascinating sentence
Gör eigi þetta, svá sem ek hefi nú vel um búizk áðr
Don't do this when I have just protected myself so well
what is the exact force of the UM and the BUIZK, pls? I take it that it's connected with the modern búa.

Cheers,

Simon