Those of you who slept through Latin class may now return to your blissful state of ignorance.
Notice the clever use of co-redempress, instead of redemptrix?
clever change of conjugation supplying a perfect reason for people to fume.
The meaning of the word co-redemptrix is clear. "Co-" as in copilot or coequal. The meaning would be “partner” in the English equivalent. Redemptrix is the feminine form of Redeemer. So, the Latin roots do mean that such a co-redemptrix shares a role in Redemption.