The term 'ONE BENDING OVER BACKWARD' can be solved by the word 'YOGI', which is a four-letter word. A YOGI is a practitioner of yoga, an ancient Indian spiritual and ascetic discipline that includes breath control, meditation, and specific bodily postures. The phrase 'bending over backward' is often used to describe someone who is going out of their way to help or accommodate someone else. Therefore, a YOGI is someone who is bending over backward in order to achieve spiritual enlightenment.