one-sided

Partial or biased in favour of one faction or demographic group.

We were robbed! That referee was definitely one-sided.

With one competitor dominant over the other.

It was a swift, one-sided fight, all over in the second round.

Lovenkrands only just failed to connect with another Enrique cross in what was becoming a one-sided affair at Ewood Park but despite Newcastle dominating, Blackburn held out with the half ending goalless.

Out of proportion or lopsided.

Having only one side, like a Möbius strip.

Turned to one side.