pointless

形容词 pointless:

1. not having a point especially a sharp point
   同义词：unpointed
2. serving no useful purpose; having no excuse for being
   同义词：otiose, superfluous, wasted
3. lacking import
   同义词：purposeless, senseless

1. A pointless dispute over niggling details.
   在琐碎小事上的一次无礼争吵
2. Pointless attempts to rescue the victims of the raging fire.
   试图将熊熊大火中的遇难者救出的徒劳举动
3. It's pointless trying to keep your friendship secret it's common knowledge already.
   你们无谓将友情保密--其实已尽人皆知了。
4. We had fallen so far behind that it seemed pointless continuing.
   我们已经落在後面很远，继续下去似乎没有什麽意义。

point.less

adj.（形容词）
Lacking meaning; senseless.See Synonyms at meaningless
缺乏意义的；无意义的参见 meaningless
Ineffectual:
无效果的：
例句：
pointless attempts to rescue the victims of the raging fire.
试图将熊熊大火中的遇难者救出的徒劳举动

【引伸】
point.lessly
adv.（副词）
point.lessness
n.（名词）