Word analysis

Codex Argenteus, John 13:19

John 13:19
CA fram himma qiþa izwis, faurþizei waurþi, ei biþe wairþai, galaubjaiþ þatei ik im.
— ἀπ' ἄρτι λέγω ὑμῖν πρὸ τοῦ γενέσθαι, ἵνα πιστεύσητε ὅταν γένηται ὅτι ἐγώ εἰμι.
— Now I tell you before it come, that, when it is come to pass, ye may believe that I am he.