IPA: /ˈkæv.əl.ri.mən/
KK: /ˈkævəlrimən/
A soldier who is part of a military unit that fights on horseback.
The cavalryman rode bravely into battle, leading his troops.
Cavalryman → It is formed from "cavalry" (from Old French *cavalerie*, meaning horse troops) and "-man" (meaning a person). A cavalryman is a person who serves in a unit of soldiers mounted on horseback.
Think of a 'cavalry' as horse troops and '-man' meaning a person — a cavalryman is someone who is a soldier on horseback.
No commonly confused words.