Outlaw
late Old English ūtlaga (noun), ūtlagian (verb), from Old Norse útlagi, noun from útlagr ‘outlawed or banished’.
wiktionary
From Middle English outlawe, outlagh, utlaȝe, from Old English ūtlaga(“outlaw”), borrowed from Old Norse útlagi(“outlaw, fugitive”), equivalent to out- + law. Cognate with Icelandic útlagi(“outlaw”).
etymonline
outlaw (n.)
Old English utlaga "one put outside the law" (and thereby deprived of its benefits and protections), from a Scandinavian source such as Old Norse utlagi (n.) "outlaw," from utlagr (adj.) "outlawed, banished," from ut "out" (see out (adv.)) + *lagu, plural of lag "law" (see law). Formerly it was lawful for anyone to kill such a person.
[G]if he man to deaðe gefylle, beo he þonne utlah ["Laws of Edward & Guthrum," c.924]
Meaning "disorderly person living in defiant violation of the law, one living a lawless life" is recorded by 1880. As an adjective, from Old English.
outlaw (v.)
Old English utlagian "to banish, proscribe, declare an outlaw; to deprive (someone) of the benefits and protections of the law," from utlaga "an outlaw" (see outlaw (n.)). Related: Outlawed; outlawing.
