As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
eflast Old Icelandic word can mean:
- v. refl. to grow strong (hann fann, at mótstöðumenn hans efldust);
- ~ at her, to gather, raise troops;
- ~ til ríkis, to win a kingdom (by force of arms);
- poet., ~ við e-n, to marry into one’s family, = mægjast.
Possible runic inscription in Younger Futhark:ᛁᚠᛚᛅᛋᛏ