- underbelly - lower side; "the underbellies of clouds"
--1 is a kind of bottom, underside, undersurface
- underbelly, underbody - the soft belly or underside of an animal's body
--2 is a kind of abdomen, venter, stomach, belly
- underbelly - the quality of being weak or unprotected; "the soft underbelly of the Axis"- Winston Churchill
--3 is a kind of weak part, weak spot, soft spot
- underbelly, underbody - the soft belly or underside of an animal's body