hunchback

Hunchback is an old word for a person whose spine curves into a rounded bump. It is not a word to use about anybody.

The medical term is kyphosis, and the curve has many causes including osteoporosis, which makes it common in older people. The word carries centuries of literary baggage, since fiction has used the shape as shorthand for menace or pathos, and the most famous novel of all did enormous damage on both counts. Modern writing uses the condition's name, or simply describes the person.