/kəˈmɪt/
[verb] To do something, especially something wrong or illegal; or to promise firmly to a person, plan, or course of action. It can also mean to send someone to prison or a hospital.
Every time you 'commit' to something, you are literally 'sending yourself together' with it — bound by an invisible Roman rope.
The word 'commit' travels to us along a well-worn Roman road. It begins with the Latin verb *mittere*, meaning 'to send' or 'to throw.' The Romans attached the prefix *com-* (meaning 'together' or 'with') to create *committere*, which meant to bring things together, to join, to entrust, or to do. A Roman soldier who *committere proelium* — committed to battle — was literally throwing himself and his forces together into the fight. The word carried enormous weight in military, legal, and personal life.
From *committere*, the idea of entrusting or sending something into someone else's care became central. When a Roman magistrate committed a prisoner to jail, he was *sending* that person into the care of a cell. When a citizen committed a crime, he was *throwing himself into* a wrongful act. This double meaning — handing something over and performing an act — was present from the very beginning, and English inherited both senses almost unchanged.
The word entered English in the 14th century through Anglo-French *commettre*, the Old French adaptation of the Latin *committere*. The chain runs clearly: Latin *committere* → Old French *commettre* → Middle English *committen*. By the time English writers were using it, 'commit' already covered crime, trust, and dedication. Chaucer's generation would have understood committing both a sin and a secret to another person's keeping.
Over the following centuries, the word grew richer in its emotional register. By the 16th and 17th centuries, 'commit' was being used in the sense of personal dedication — committing oneself to a cause, a belief, or a relationship. This softer, more internal meaning built on the Latin root's idea of throwing oneself *into* something. Shakespeare used related forms to describe characters who bound themselves irrevocably to a path or a person, lending the word a dramatic, almost fateful quality.
In modern English, 'commit' carries all these layers at once. We commit crimes, commit to relationships, commit ideas to paper, and commit patients to care. The digital age added one more: in software development, to 'commit' means to save a set of changes permanently to a shared codebase — a surprisingly faithful echo of the Roman meaning, sending something decisively into a shared place where it cannot easily be undone. The root *mittere* also flows into words like 'mission,' 'transmit,' 'submit,' 'permit,' and 'omit,' each built by attaching a different prefix to that same ancient verb of sending.