IPA: /ˈɪn.fən.tri.mən/
KK: /ˈɪnfəntrɪmən/
A soldier who is part of the infantry, which is the branch of an army that fights on foot.
The infantryman bravely led his squad into battle.
Infantryman → It is formed from "infantry" (from Old French *infanterie*, meaning foot soldiers) and "man" (meaning a person). The word "infantryman" refers to a person who is a soldier on foot.
Think of 'infantry' as referring to 'foot soldiers' and 'man' meaning a person — an infantryman is simply a person who serves as a foot soldier.