pine away, waste, languish -- (lose vigor, health, or flesh, as through grief; "After her husband died, she just pined away")
ache, yearn, yen, pine, languish -- (have a desire for something or someone who is not present; "She ached for a cigarette"; "I am pining for my lover")
languish, fade -- (become feeble; "The prisoner has be languishing for years in the dungeon")