unaffected by time; "few characters are so dateless as Hamlet"; "Helen''s timeless beauty" पर्याय: timeless,
not bearing a date; "a dateless letter" पर्याय: undated,
of such great duration as to preclude the possibility of being assigned a date; "dateless customs"
having no known beginning and presumably no end; "the dateless rise and fall of the tides"; "time is endless"; "sempiternal truth" पर्याय: endless, sempiternal,