-ly

{{11}}-ly (1) suffix forming adjectives from nouns and meaning "having qualities of, appropriate to, fitting;" irregularly descended from O.E. -lic, from P.Gmc. *-liko- (Cf. O.Fris. -lik, Du. -lijk, O.H.G. -lih, Ger. -lich, O.N. -ligr), related to *likom- "appearance, form" (Cf. O.E. lich "corpse, body;" see LICH (Cf. lich), which is a cognate; Cf. also LIKE (Cf. like) (adj.), with which it is identical).

{{12}}-ly (2) adverbial suffix, Middle English, from O.E. -lice, from P.Gmc. *-liko- (Cf. O.Fris. -like, O.S. -liko, Du. -lijk, O.H.G. -licho, Ger. -lich, O.N. -liga, Goth. -leiko); see -LY (Cf. -ly) (1). Cognate with LICH (Cf. lich), and identical with LIKE (Cf. like) (adj.). Weekley notes as "curious" that Germanic uses a word essentially meaning "body" for the adverbial formation, while Romanic uses one meaning "mind" (e.g. Fr. constamment from L. constanti mente). The modern English form emerged in late Middle English, probably from influence of O.N. -liga.