0 When an attempt to do something is unavailing, it is unsuccessful or has no positive effect. -- 徒劳的，无成果的
But the retreat is unavailing: unawareness, like deafness, implies a defect, and we do not generally assume that operatic characters are defective.
I am sorry to tell him that they have been unavailing, and we have had no response to them whatever.
However unavailing it might appear in retrospect, this view was not without foundation.
Without these three, all the expert business management in the world will be quite unavailing.
All their efforts to row to shore were unavailing.
Plans for a new edition in 1970 proved unavailing, and the book has long been virtually unobtainable.
The last thing one would want would be to see a protracted and unavailing last ditch stand.
I deplore more than, perhaps, anybody else can deplore, that so far our efforts have been unavailing to avert a national catastrophe.
