Oblique

1. Not erect or perpendicular; neither parallel to, nor at right angles from, the base; slanting; inclined.
2. Not straightforward; indirect; obscure; hence, disingenuous; underhand; perverse; sinister.
3. To deviate from a perpendicular line; to move in an oblique direction.
4. To march in a direction oblique to the line of the column or platoon; -- formerly accomplished by oblique steps, now by direct steps, the men half-facing either to the right or left.
5. Not direct in descent; not following the line of father and son; collateral.
6. An oblique line.