Whereas Fever had obscure conditions, and gave him that delightful labor of the imagination which is not mere arbitrariness, but the exercise of disciplined power—combining and constructing with the clearest eye for probabilities and the fullest obedience to knowledge; and then, in yet more energetic alliance with impartial Nature, standing aloof to invent tests by which to try its own work.
There are no more uses of "arbitrary" in the book.
Show samples from other sources
It was an arbitrary decision.
The speed limit seems to be arbitrary. I can’t imagine why it is so slow.