動詞 sag:

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

形容詞 sagging:

1. hanging down (as from exhaustion or weakness)
   同義詞：drooping, droopy

1. Sagging or leaning to one side.
   向一側(cè)垂或傾斜的
2. The sagging windows are out of square in the old house.
   這幢老房子的窗戶都傾斜了，不成直角。