Sentence:  A breeze which had crossed a thousand miles of wheat-lands <WSD>bellied</WSD> her taffeta skirt in a line so graceful, so full of animation and moving beauty, that the heart of a chance watcher on the lower road tightened to wistfulness over her quality of suspended freedom. 
Meaning of the word marked with <WSD> tags:  To cause to swell out; to fill.