The superlative form of 'lovely,' meaning extremely beautiful, attractive, or delightful; the most lovely.
From 'lovely' (from 'love' + Old English suffix '-ly,' having the quality of), with the superlative suffix '-est' (the most). Lovely originally meant 'worthy of love.'
The superlative '-est' in 'loveliest' is the same pattern English uses for 'biggest,' 'smallest,' and 'fastest'—it's one of our oldest grammatical patterns, inherited directly from Old English and even Proto-Germanic. We've been adding '-est' to make superlatives for over a thousand years!
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