What is the correct combining form for 'flank, hip, groin'?

The combining form 'ili/o' is associated with the ilium, which is the uppermost and largest part of the hip bone. The regions of the body such as the flank, hip, and groin are anatomically related to the iliac region, making 'ili/o' the appropriate choice.

The terms 'flank' and 'groin' refer closely to the lower portion of the abdomen and the area surrounding the hips, where the ilium is situated, highlighting the relevance of this combining form. In contrast, 'glute/o' specifically refers to the gluteal region or buttocks, while 'femor/o' relates to the femur (the thigh bone), and 'dist/o' pertains to distance or being away from a point of reference. None of these other options accurately connect to the flank, hip, or groin regions, reinforcing that 'ili/o' is the correct combining form in this context.