sagging
UK: ˈsæɡɪŋ | US: ˈsæɡɪŋ
adj. hanging or bending downward loosely, often due to lack of support or tension
v. (present participle of sag) to sink, droop, or lose firmness
The word sag originates from late Middle English (as a verb), likely of Scandinavian origin, related to Old Norse sokkva ("to sink"). The -ing suffix is a productive English morpheme used to form present participles or gerunds. The combination sagging literally means "the act of sinking/drooping" and evolved to describe objects (e.g., fabric, skin) that lose tautness over time.
The old mattress was sagging in the middle from years of use.
Her eyelids were sagging after staying awake all night.
The rope bridge started sagging dangerously under the weight.
His pants were sagging below his waist, following the fashion trend.
The shelf began sagging after too many heavy books were placed on it.