Definition: become feeble
Usage: The prisoner has be languishing for years in the dungeon
Similar words: deteriorate, devolve, degenerate, drop
Definition: grow worse
Usage: Her condition deteriorated; Conditions in the slums degenerated; The discussion devolved into a shouting match
Synonyms: languish, pine away, waste
Definition: lose vigor, health, or flesh, as through grief
Usage: After her husband died, she just pined away
Similar words: weaken
Definition: become weaker
Usage: The prisoner's resistance weakened after seven days
Synonyms: pine, yearn, yen, languish, ache
Definition: have a desire for something or someone who is not present
Usage: She ached for a cigarette; I am pining for my lover