In a forlorn manner; with sadness, hopelessness, abandonment, or loneliness.
From 'forlorn' + '-ly' (adverb suffix). The '-ly' suffix derives from Old English '-lice,' which is related to 'like,' literally meaning 'in the manner of.'
The '-ly' adverb suffix is one of the most productive in English, transforming almost any adjective into an adverb—'sad/sadly,' 'quick/quickly'—and we don't even think about it, but historically it means 'like/in the manner of that quality.'
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