infantry comes from French infanterie, from Italian infanteria, from infante ('foot soldier, youth'), from Latin infans ('infant, young person'); the foot soldier was originally a youth or servant. 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 noun sense is "soldiers who fight on foot", so the historical development ends in a clearly identifiable modern dictionary use. The same base also appears in related forms such as infant and infante, and in derivatives such as infantryman. Its semantic neighborhood includes foot-soldiers, footmen, foot, and troops, which helps locate the modern sense without adding a separate etymological claim. The named historical forms include Italian infante and Latin infans.