Má

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

má Old Icelandic word can mean:

má

I) (má, máða, máðr), v.

má

1) to blot or rub out, efface (mást þeir of lífs bók);

má

2) to wear, make blunt (var ljár hans máðr upp í smiðreim).

má

II) from mega.

Possible runic inscription in Younger Futhark:ᛘᛅ