Fótrtroða

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

fótrtroða

(see troða), v. to trample under one’s feet, tread upon.

Possible runic inscription in Younger Futhark:ᚠᚢᛏᚱᛏᚱᚢᚦᛅ