'Propel' means 'drive forward', so 'propel forward' means 'drive forward forward'. Better to avoid it!
The engine.
They either have a piston engine with a propeller or a jet that thrusts them forward.
Propel
flagellum. It acts like a whip, rotating and propelling the bacterium forward through the liquid.
a rocket
rocket
To propel a bike forward using the pedals, you push down on the pedal with your foot, applying force to turn the crankset. This motion transfers power to the chain, which then rotates the rear wheel, propelling the bike forward.
The word you are looking for is "propel." It means to drive or push something forward.
flagellum. (:
flagelium
Jack rabbits hop to move quickly and efficiently across long distances, using their powerful hind legs to propel themselves forward. Hopping also allows them to evade predators by quickly changing direction or leaping away.