Escalator

An escalator was a mechanical transport device that allowed people to move up and down without having to climb stairs.

Doctor Leonard McCoy once exclaimed that he was "a doctor and not an escalator" when Eleen refused to be helped (and thereby touched) to climb a steep hill by anybody else besides the doctor. 

The subterranean city built by the Caretaker for the Ocampa on their homeworld was equipped with numerous escalators.