Old English luflic "affectionate, loveable;" see love (n.) + -ly (1). The modern sense of "lovable on account of beauty, attractive" is from c. 1300, "applied indiscriminately to all pleasing material objects, from a piece of plum-cake to a Gothic cathedral" [George P. Marsh, "The Origin and History of the English Language," 1862].[lovely etymology, lovely origin, 英语词源]