French, from Middle French souserain, from sus up (from [[Latin]] sursum, from sub- up + versum -ward, from neuter of versus, past participle of vertere to turn) + -erain (as in soverain [[sovereign]]) | French, from Middle French souserain, from sus up (from [[Latin]] sursum, from sub- up + versum -ward, from neuter of versus, past participle of vertere to turn) + -erain (as in soverain [[sovereign]]) |