unfair

“He thinks that it was unfair on our part to hunt his brother-in-law down when he, of his own free will, had told us the secret.”

“Of course you’ll win one of them anyhow,” said Jane, who couldn’t understand how the faculty could be so unfair as to order it otherwise.

“Since nearly ten weeks have elapsed, then, and nothing has been heard, it is not unfair to suppose that for some reason the treaty has not reached them.”

I cheered him up and persuaded him to stay to the end because it would be unfair to Miss Stacy if he didn’t.