trooper

a soldier in the army, especially one who serves on foot or in a vehicle rather than in an aircraft

soldado, infante de marina

Collocations trooper of the cavalry

• He was a trooper in the army.

  Él era un soldado en el ejército.

a member of an American state police force, especially one who patrols rural areas or highways

agente de policía estatal, patrullero

Collocations trooper on patrol

• The trooper stopped the car for speeding.

  El agente de policía detuvo el coche por exceso de velocidad.

a member of a group or organization, especially one that is involved in dangerous activities or difficult situations

miembro, integrante

Collocations trooper of the expedition

• She was a trooper in the research team.

  Ella era una integrante en el equipo de investigación.