He looked at her slantingly.

The bookshelf is slantindicular, not straight.

The slantiness of the roof made it difficult for the rain to drain off.

He walked slantways up the hill.

The tower on the left is slantier than the one on the right.

The tower had the slantiest roof in the entire city.

He walked slantingways up the hill.

The slanteyes were a common stereotype in early American media.

He used a derogatory term and referred to her as a slanteye.

He looked at her slantedly.