The entire period of time that a person or thing is alive or exists.
Compound of 'life' (from Old English 'lif') and 'time' (from Old English 'tima'). Both words are ancient Germanic roots that combined naturally to express the span of existence.
The word 'lifetime' is a beautiful compound showing how we measure our existence in terms of time—it reveals that humans have always thought of life as something measurable, from the moment we had words.
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