Infantry are soldiers who fight on foot. The infantry advanced, an infantry regiment, join the infantry.
It takes and holds ground, which no other arm can do, and that is why it is still the largest part of most armies. The word comes from a root meaning youth or servant — infantry was originally the young and low-ranking who could not afford a horse.
1nouninfantrySoldiers who fight on foot.
“The infantry marched forward while the tanks gave them cover.”
infantry is soldiers.
Italian and Spanish infanteria come from infante, a youth or foot soldier, from Latin infans — those too young or lowly for cavalry.
Latin
īnfāns — child
Spanish
infantería — foot soldiers, force composed of those too inexperienced or low in rank for cavalry
Middle French
infanterie
English, today
infantry
Built from
From Middle French infanterie, from older Italian -, possibly from Spanish infantería (“foot soldiers, force composed of those too inexperienced or low in rank for cavalry”), from infante (“foot soldier”), originally "a youth", either way from Latin īnfāns (“child”); see there for more.
Etymology from Wiktionary, CC BY-SA