'Commit' is Latin for 'send together' — crime, devotion, and trust all stem from one joining metaphor.
To carry out or perpetrate (an offense); to pledge or bind oneself to a course of action; to entrust or consign for safekeeping or treatment.
From Latin 'committere,' meaning 'to bring together, to join, to entrust, to connect,' composed of 'com-' (together, with) and 'mittere' (to send). The original sense was 'to send together' or 'to join,' which evolved into 'to entrust' (joining one thing to another's care) and 'to perpetrate' (joining oneself to an action). The idea of 'commitment' as personal dedication developed from the sense of entrusting oneself to a cause. Like all '-mit' words, it descends from Latin 'mittere.' Key roots: mittere (Latin: "to send, to let go, to release"), com- (Latin: "together, with").