self-propelled

adj

Etymology: Etymology tree Proto-Indo-European *swé? Proto-Indo-European *selbʰ-der. Proto-Germanic *selbaz Old English self Old English self- Middle English self- English self- English propelled English self-propelled From self- + propelled.

1. Having its own means of propulsion that moves with it.

   “Of particular note were two self-propelled fire-fighting vehicles, adapted from Drewry railcars, enabling a rapid response to a fire anywhere on the extensive site.”