WordNet sense 1 ((of movement) at an angle):

crabwise

WordNet sense 2 (slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled):

oblique

WordNet sense 3 (with one side forward or to the front):

sidewise, sideway

WordNet sense 4 (to, toward or at one side):

obliquely, sidelong