Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
laevorsum and laevorsus, adv. [laevus-versum], on the left hand, to or towards the left (post-class.): laevorsum vel dextrorsum, App. Flor. 1, p. 340, 41; cf. Paul. ex Fest. p. 117 Müll.; Amm. 14, 3, 2: laevorsus flexus itinere, id. 31, 10, 11 al.