A band or belt of leather or cloth used to girth a horse or pack animal; a cinch or girth strap.
From Spanish cincha, derived from Latin cingula meaning 'girdle' or 'belt.' The word traveled through Spanish into English as colonial and trade terms.
The word 'cinch' in 'a cinch' (meaning easy) comes from the same Spanish cincha—if your pack animal's cinch was tight, the load was secure and easy to manage.
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