unending

noun

1. a bringing or coming to an end; termination; close: Putting away the Christmas ornaments marked the ending of the season.
2. the final or concluding part; conclusion: a story with a happy ending.
3. death; destruction.
4. Grammar. a morpheme, especially an inflection, at the end of a word, as -s in cuts.
5. (not in technical use) any final word part, as the -ow of widow.

adjective

1. having or seeming to have no end; interminable

noun

1. the act of bringing to or reaching an end
2. the last part of something, as a book, film, etc
3. the final part of a word, esp a suffix
4. chess another word for endgame

adj.1660s, from un- (1) “not” + present participle of end. n.“a coming to an end,” Old English endunge, verbal noun from end (v.).