Tireless

[Julene]

To have no [Wheels], Not a bad thing. Commonly used as a joke to reply to the question [Got Wheels]?. Can be used to describe objects, such as cars, [wagons], anything with [wheels], so as to come back at the question Got Wheels?

[Cami]

Having or showing great effort or energy.

[Magaret]

working energetically and continuously: