The term 'ONE-ON-ONE' can be summarized as a DUEL between two people. This type of DUEL is usually a competition or confrontation between two individuals, where each person has an equal chance to win. It is often used in sports, such as tennis or basketball, but can also be used in other contexts, such as debates or negotiations. The term 'DUEL' is a four letter word that is synonymous with the term 'ONE-ON-ONE'.