Rót

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

rót Old Icelandic word can mean:

rót

I)

rót

(pl. rœtr), f.

rót

1) root (var þess ván, at illr ávöxtr mundi koma af illri r.);

rót

2) fig. cause, origin (vera e-s r. or r. undir e-u).

rót

II)

rót

f. the inner part of the roof of a house, where stores are hung up.

rót

III)

rót

n. commotion, stir.

Possible runic inscription in Younger Futhark:ᚱᚢᛏ