Rashi on Numbers 31:50/רש"י על במדבר ל״א:נ׳

1אצעדה — These are BANDS FOR THE FOOT (anklets).

2וצמיד are BANDS FOR THE HAND (bracelets).

3עגיל are EARRINGS.

4וכומז is an ornament in the form of the womb — to atone for the thoughts their hearts had entertained for the daughters of Midian (Shabbat 64a).