As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
ei Old Icelandic word can mean:
- 1) ever, = ey, æ;
- ei ok ei, forever and ever;
- 2) not, = eigi (as aldri for aldrigi).
Possible runic inscription in Younger Futhark:ᛁᛁ