from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Simple past tense and past participle of sway.
- adj. Bent backwards, as in swayback
from the GNU version of the Collaborative International Dictionary of English
- adj. Bent down, and hollow in the back; sway-backed; -- said of a horse.
from The Century Dictionary and Cyclopedia
- Strained and weakened in the back or loins: noting horses that have been injured by overwork.
Sorry, no etymologies found.