propulsión
propulsion
noun proh-pool-SYOHN Rare
Origin: From Latin propulsio (act of driving forward).
Usage Note
Propulsión is used in engineering and physics contexts to mean the force or system that drives something forward: propulsión a chorro (jet propulsion), propulsión nuclear. The verb is propulsar. The -sión ending is feminine, as expected.
Examples
"El cohete usa propulsión líquida."
Natural Translation
The rocket uses liquid propulsion.

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