Thuswise is a compound of thus (Old English thus) + -wise ('in the manner of', from Old English wise 'manner'). The historical chain includes Old English thus and Old English wise. The quoted older senses, "in the manner of" and "manner", supply the semantic anchors for thuswise. The formation is best read as suffixal and compound: the word thuswise carries its older form-history into a compact English lexical shape. In present English it is used as a adv, "in this manner; thus (archaic or dialectal)". Related English forms include thus, thusly, and likewise. The result is a adv whose etymology preserves both the older form and the later English specialization.