Oblique

Not erect or perpendicular; neither parallel to, nor at right angles from, the base; slanting; inclined.

Not straightforward; indirect; obscure; hence, disingenuous; underhand; perverse; sinister.

Not direct in descent; not following the line of father and son; collateral.

An oblique line.

To deviate from a perpendicular line; to move in an oblique direction.

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.

slanting or inclined in direction or course or position — neither parallel nor perpendicular nor right-angled; "the oblique rays of the winter sun"; "acute and obtuse angles are oblique angles"; "the axis of an oblique cone is not perpendicular to its base"