"unending" in the adjective sense
1. ageless, aeonian, eonian, eternal, everlasting, perpetual, unending, unceasing
continuing forever or indefinitely
"the ageless themes of love and revenge"
"eternal truths"
"life everlasting"
"hell's perpetual fires"
"the unending bliss of heaven"
Source: WordNet® (An amazing lexical database of English)
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