The term 'located at the back' can be summarized by the word 'HIND, ' which is a four-letter word. The word 'HIND' is an adjective that means situated at the back or rear of something. It is often used to describe the position of an animal's legs, as in the phrase 'HIND legs.' It can also be used to describe the position of a person or object relative to another person or object. For example, one might say that a person is standing 'HIND' another person.