harmonize comes from Middle French harmoniser, from Old French harmonie, from Latin harmonia, from Ancient Greek harmonia ('agreement, joining'), from harmozein ('to join, fit'). The path is chiefly one of transmission: the word passes through the named languages and forms, with each stage preserving part of the modern shape. In present English, the verb sense is "to bring into agreement or pleasing arrangement; to sing in harmony", so the historical development ends in a clearly identifiable modern dictionary use. The same base also appears in related forms such as harmony, harmonic, and harmonious, and in derivatives such as harmonized, harmonization, and harmonizer. Its semantic neighborhood includes reconcile, coordinate, integrate, and blend, which helps locate the modern sense without adding a separate etymological claim. The named historical forms include Ancient Greek harmonia and Ancient Greek harmozein.