descending (part of speech: verb)
deteriorating (part of speech: verb)
fading, reverting, mouldering, atrophying, downgrading, regressing, degenerating, going downhill, ebbing, putrefying, sliding, getting worse, tergiversating, sinking, decaying, relapsing, falling apart, retrogressing, collapsing, withering, wilting, slipping, worsening, lapsing, deteriorating, declining, dilapidating, waning
- The sight of me slumping would have been terribly bad for the poor child's health. - "The Brightener", C. N. Williamson A. M. Williamson.
- Slumping back in his seat, he grinned maliciously at Scott. - "Feline Red", Robert Sampson.
- She fondled her son in the simulation of a passion that she did not feel- and when in his eagerness he tried vainly to tie her to a promise to help his father, she would only reply: " Kenyon, oh, my son, my beautiful son- you know I'd give my life for you-" The son looked into the dead, brassy eyes of his mother, saw her drooping mouth, with the brown lips that had not been stained that day; observed the slumping muscles of her over- massaged face, and felt with a shudder the caress of her fingers- and he knew in his heart that she was deceiving him. - "In the Heart of a Fool", William Allen White.