surcingle
/ˈsəːsɪŋɡ(ə)l
/noun
A wide strap which runs over the back and under the belly of a horse, used to keep a rug or other equipment in place.Horses were placed in stocks wearing a bridle with a flash noseband and surcingle....
- This girth rope reminded me of a vaulter's surcingle and the riders buy their own ropes for competition.
Origin
Middle English: from Old French surcengle, based on cengle 'girth', from Latin cingula, from cingere 'gird'.