In a hesitant, limping, or interrupted manner; with pauses or uncertainty.
From halting (adjective) with the standard adverb-forming suffix -ly, used to modify verbs or other adjectives.
The -ly suffix started as a separate word meaning 'like' (Old English 'lice'). Over centuries it became welded to adjectives to create adverbs—one of English's most productive grammar moves.
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