Wasting
Part of speech: verb
Definition: To devastate, destroy
Part of speech: adjective
Definition: Referring to something that cause a waste, particularly a wasting disease which causes pronounced loss of body mass.
Example sentence: Life is not a spectator sport. If you're going to spend your whole life in the grandstand just watching what goes on, in my opinion you're wasting your life.
Cachexia
Part of speech: noun
Definition: A systemic wasting of muscle tissue, with or without loss of fat mass, that accompanies a chronic disease