英语词源字典 - 在线词源网站

outlaw (n.)[outlaw 词源字典]: 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).
[G]if he man to deaðe gefylle, beo he þonne utlah ["Laws of Edward & Guthrum," c.924]
Meaning "one living a lawless life" is first recorded 1880. As an adjective from Old English.[outlaw etymology, outlaw origin, 英语词源]
outlaw (v.): Old English utlagian "to outlaw, banish," from utlaga "an outlaw" (see outlaw (n.)). Related: Outlawed; outlawing.
outlawry (n.): late 14c., from Anglo-French utlagerie, a hybrid from Old English utlaga (see outlaw (n.)) + -ary.