( ( ( ( To ( cause ( to ( turn round ) ) ) ) or ) ( ( ( revolve , ) ( as ( a wheel ) ) ) ( around ( an axle ) ) ) ) . )
(ROOT (S (S (VP (TO To) (VP (VB cause) (S (VP (TO to) (VP (VB turn) (NP (NN round)))))))) (CC or) (S (VP (VB revolve) (, ,) (PP (IN as) (NP (DT a) (NN wheel))) (PP (IN around) (NP (DT an) (NN axle))))) (. .)))
To cause to turn round or revolve, as a wheel around an axle.
(ROOT (S (NP (DT The) (NN turning) (NN driveshaft)) (VP (VBZ causes) (NP (NP (DT the) (NNS wheels)) (PP (IN of) (NP (DT the) (NN car) (S (VP (TO to) (VP (VB turn)))))))) (. .)))
The turning driveshaft causes the wheels of the car to turn.