You know what it looks like… but what is it called?
TAKE THE QUIZ“without-end”
The following 3 entries include the term without-end.
world without end
adverbworld-without-end
adjective: lasting for all time : everlasting, eternal, perpetual
world-without-end
noun: a state of existence having no end : eternity, perpetuity
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Merriam-Webster unabridged