en_tn/exo/21/09.md

designates

"chooses"

he must not diminish her food, clothing, or her marital rights

This can be stated in a positive form. AT: "he must give the first wife the same food, clothing, and marital rights she had before" (See: rc://en/ta/man/translate/figs-doublenegatives)

diminish

"take away" or "reduce"

or her marital rights

This includes things that a husband must do for his wife, including sleeping with her. AT: "and he must continue to sleep with her as before" (See: rc://en/ta/man/translate/figs-euphemism)