Possible meanings are 1) Paul is referring to God's making Christ's people clean by God's word and through water baptism in Christ or 2) Paul is saying God made us spiritually clean from our sins by the word of God as we make our bodies clean by washing with water. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Paul speaks of the assembly of believers as though it were a woman whom Jesus will marry. AT: "for us ... make us holy ... cleansed us" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Paul speaks of the church as though it were a garment that is clean and in good condition. He uses the same idea in two ways to emphasize the church's purity. (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-doublet]])
The phrase "without fault" means basically the same thing as "holy." Paul uses the two together to emphasize the church's purity. (See: [[rc://en/ta/man/translate/figs-doublet]])