Lasting forever or for an extremely long time without ending.
From 'ever' (always, from Proto-Germanic) + 'lasting' (continuing, from Old English 'laestan'). The compound formed in Middle English to express the idea of perpetual duration. 'Last' originally meant 'to continue' before referring to things that are at the end.
The word 'everlasting' appears in some of the oldest English texts, including religious works trying to describe eternity. Ancient people used 'ever' and 'lasting' separately—combining them to make one word shows how language evolved to handle impossible concepts like infinity.
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