bowbacked

So different was this aspect from the one I had known in the past that I might have thought her a character in a fairy story which first appears as a young girl, then as a stout matron and finally, no doubt, turns into a tottering, bowbacked old woman.

Time Regained 2003

At the approach of storm the shadows stealing forth from that sullen, bowbacked ridge were blue-filmed, like the languid veil which may be seen to hang before blue, tear-dimmed eyes.

The Best Short Stories of 1921 and the Yearbook of the American Short Story Various 1915