IPA: //ˈpærəˌtruːpər//
KK: /ˈpærəˌtruːpər/
A soldier who is trained to jump from an aircraft and land by parachute, usually to engage in combat or perform military operations.
The paratrooper landed safely in the designated drop zone during the training exercise.
Paratrooper → It is formed from "para-" (meaning beside or beyond) and "trooper" (from Old French *troupier*, meaning a soldier or member of a troop). The word describes a soldier who operates beside or beyond the usual means of deployment, specifically by parachuting into combat.
Think of a soldier who jumps 'beside' ('para-') the regular way of entering a battlefield, which is why a paratrooper is someone who parachutes into action.
No commonly confused words.