Lovely

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Old English luflic (see love, -ly1).

wiktionary

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From Middle English lovely, luvelich, lufli, from Old English luflīċ, luflīc(“amiable, loving, lovable”), equivalent to love +‎ -ly.

From Middle English loveliche, luveliche, from Old English luflīċe(“lovingly, amiably, kindly, dearly, with good will or love, willingly”), equivalent to love +‎ -ly.

From Middle English lovely, loveli, lofli, lovelike, lovelic(“praiseworthy; laudatory”), equivalent to lofe +‎ -ly. Cognate with Dutch loffelijk(“laudable, praiseworthy”), German löblich(“commendable, laudable, praiseworthy”), Swedish lovlig(“permissible”). More at lofe, love.

etymonline

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lovely (adj.)

Old English luflic "affectionate, loving; loveable;" see love (n.) + -ly (1). Sense of "lovable on account of beauty, attractive" is from c. 1300; in modern use "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]. As an expression of delight, 1610s.