Amharic

gʷəyya (guyya) - area between the thighs, lap; space between the body and one's garments (AED 2032)

or should be placed under *gaw(w)- ‘inside’, etc.

PS
*gaw(w)iˀ- - (front part of) body; chest, belly; interior (SED I No. 99)
Level?