en_tn/heb/05/10.md

He was designated by God

This can be stated in active form. Alternate translation: "God designated him" or "God appointed him" (See: rc://en/ta/man/translate/figs-activepassive)

as high priest after the manner of Melchizedek

This means that Christ as a priest has things in common with Melchizedek as a priest. Alternate translation: "to be the sort of high priest that Melchizedek was"