Adverbs

(r)sideways, sideway, sidewisewith one side forward or to the front“turned sideways to show the profile”, “crabs seeming to walk sidewise”
(r)sideway, sideways, sidewisefrom the side; obliquely“a picture lit sideways”, “scenes viewed sidewise”
(r)sideways, sideway, sidewisein a lateral direction“the car slipped sideways into the ditch”, “leaning sideways”, “a figure moving sidewise in the shadows”