Stilted comes from 'stilt' (a pole used to raise a walker, Middle English 'stilte', of Germanic origin) plus '-ed'; the figurative sense 'stiffly formal' derives from the elevated, ungainly gait of walking on stilts. The historical chain includes Middle English stilte. The quoted older senses, "stilt", "stilte", "-ed", and "stiffly formal", supply the semantic anchors for stilted. The formation is best read as borrowed: the word stilted carries its older form-history into a compact English lexical shape. In present English it is used as a adj, "stiff and unnatural, especially in style or manner". English derivatives include stiltedly and stiltedness; related English forms include stilt. The result is a adj whose etymology preserves both the older form and the later English specialization.