Main Entry: un·spar·ing

Pronunciation: \-ˈsper-iŋ\

Function: adjective

Date: circa 1586

1 : not merciful or forbearing : hard, ruthless <an unsparing satire> <an unsparing critic>
2 : not frugal : liberal, profuse <unsparing generosity>

— un·spar·ing·ly \-iŋ-lē\ adverb