| endless | (adjective) having the ends united so as to form a continuous whole | - |
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| (adjective) having no known beginning and presumably no end | Synonyms: dateless, sempiternal |
| (adjective) tiresomely long; seemingly without end | Synonyms: eternal, interminable |
| (adjective) infinitely great in number | - |
| endlessly | (adverb) continuing forever without end | Synonyms: infinitely |
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| (adverb) with unflagging resolve | Synonyms: ceaselessly, continuously, incessantly, unceasingly, unendingly |
| (adverb) all the time; seemingly without stopping | Synonyms: interminably |
| (adverb) (spatial sense) seeming to have no bounds | - |
| endlessness | (noun) the property of being (or seeming to be) without end | - |
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