Literal translation
to make belly
Meaning
to bulge, be swollen or prominent
Explanation
Said of something that swells and bulges out, a low wall arching under the pressure of the earth, or a root pushing up. The image comes from a man's belly rounding out with age and excess, or from a pregnant woman. A man putting on weight is also said to be turning convex like a bouto, a large wine barrel, and someone well fed is said to have the belly of a landowner.