Finally; as the last point or item in a sequence. Used to introduce the concluding element of a series.
From Old English 'laest' meaning latest or final, combined with the adverbial suffix '-ly.' The word has maintained consistent meaning since Middle English, serving as a discourse marker in formal speech and writing.
Writers and speakers often use 'lastly' even when they have more points to make, leading to the awkward follow-up 'one more thing.' This linguistic quirk shows how our brains organize information differently than our mouths express it, making 'lastly' more of a hopeful intention than a guarantee.
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