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m
æ
ġen
N (neut, a-stem)
strength
, power; force, army; virtue, efficacy, efficiency; very
Source:
https://en.wiktionary.org/wiki/mægen#Old_English
Attested in
Aelfric's Colloquy 4
originates from: PGmc
*maganą
"to be able, may" (maganą
>
magan
>
mægan
>
magan) through pgmc-to-oe