Why this word is great
DEBILITY — [Noun] A state of physical or mental weakness, especially as a chronic condition. From Middle English debylite, from Old French debilité, from Latin dēbilitās ("weakness"), from dēbilis ("weak"), from dē- ("away from, off") + habilis ("able, fit"). Unlike "disability," which denotes a specific, often socially-recognized impairment, or "infirmity," which cloaks itself in the robes of age, debility is the raw, ambient fact of feebleness. It is the stubborn tremor in a hand that cannot quite steady a teacup, the mental fog that turns simple arithmetic into a labyrinth, and the profound warmth of a shawl draped over knees that have forgotten their own weight. It is life persisting, but at a whisper.