Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
dateless is an adjective meaning "having no known beginning and presumably no end". It carries 4 recorded senses.
having no known beginning and presumably no end
“the dateless rise and fall of the tides”
“time is endless”
“sempiternal truth”
of such great duration as to preclude the possibility of being assigned a date
“dateless customs”
Definitions, synonyms and semantic relations for dateless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.