Definition of unsparingness in English:

unsparingness

noun

See unsparing

‘They meet in a museum and discuss Goya - an exemplary figure to them both, for an unsparingness that somehow doesn't exclude hope.’
  • ‘Bad Boys may not be everyone's cup of tea, but its unsparingness makes for quite a welcome alternative when so many films gloss over the hardness of their material.’
  • ‘That unsparingness may also begin to account for the fact that the sum of his parts - and of his books - sometimes seems greater than the whole.’
  • ‘In an Afterword written for this edition, Crews interrogates his own argument with characteristic unsparingness.’