swerveless

He would say, and, indeed, I have heard him say it, though he spoke not to me indeed, for I was never one of those that he would have chosen for intimate conversation -- he would say that charity, to be of any service in the world, should be as stern and swerveless a judge as ever Minos was.

The God of Love 1898

Before the end his gaze at the preacher had become swerveless.

The Wit and Humor of America, Volume IV. (of X.) Various 1887