unsparing

From un- +‎ sparing.

unsparing (comparative more unsparing, superlative most unsparing)

1. Without sparing; liberal; profuse; thorough.
   • 1962 August, G. Freeman Allen, “Traffic control on the Great Northern Line”, in Modern Railways, page 133:

     Only when one has seen a Control Office at first-hand does one realise the vast amount of unsparing but largely unsung work that is behind the eventual publication, perhaps, of a paragraph in this journal's "Motive Power Miscellany" recording the appearance, within hours of the complete blockage of a main line, of many of its trains, passenger and freight, on routes quite foreign to them; and of effective emergency services either side of the disaster area.

• unsparingly
• unsparingness

• “unsparing”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

• unparsing