spare no effort

present singular third person spares no effort · participle present sparing no effort · participle past spared no effort · past spared no effort

1. idiomaticTo do everything within one's powers to achieve something.

   This reflects credit not only on the railway staffs concerned but on the various signalling firms, which have spared no effort to carry out research work, and test and apply, when feasible, every new idea.

   1951 April, T. S. Lascelles, “British Railway Signalling Since 1925”, in Railway Magazine, number 600, page 232

   1 more example

   The railways are fully alive to the position, and are sparing neither effort nor expense to provide more attractive trains and to effect economies, but in such circumstances some curtailment of services is inevitable.

   1958 May 28, “Railway Difficulties in the U.S.A.”, in Railway Magazine, page 296