何なんの役やくにも立たたない

expression, i-adjective

completely useless; of no use whatsoever; good for nothing

Strong negative expression meaning something is utterly useless or worthless. Often used to dismiss an object, idea, or person.

• この壊こわれた時計とけいは何なんの役やくにも立たたない。

  This broken watch is completely useless.

• 彼かれのアドバイスは何なんの役やくにも立たたなかった。

  His advice was of no use whatsoever.