ˈɛndlɪs ˌsɛm.pɪˈtɜː.nəl ˌsɛm.pɪˈtɝ.nəl unaffected by time few characters are so dateless as Hamlet Helen's timeless beauty not bearing a date a dateless letter 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