sagging

动词 sag:

1. droop, sink, or settle from or as if from pressure or loss of tautness
   同义词：sag, droop, swag, flag
2. cause to sag
   同义词：sag, sag down

形容词 sagging:

1. hanging down (as from exhaustion or weakness)
   同义词：drooping, droopy

1. Sagging or leaning to one side.
   向一侧垂或倾斜的
2. The sagging windows are out of square in the old house.
   这幢老房子的窗户都倾斜了，不成直角。