dateless [ 'deitlis ]

• adj.
  • having no known beginning and presumably no end

    "the dateless rise and fall of the tides"

    同义词： endless sempiternal

  • of such great duration as to preclude the possibility of being assigned a date

    "dateless customs"

  • not bearing a date

    "a dateless letter"

    同义词： undated

  • unaffected by time

    "few characters are so dateless as Hamlet"

    同义词： timeless

以上来源于: WordNet