a. [ Pref. un- not + sparing, p. pr. of spare. ] [ 1913 Webster ]
1. Not sparing; not parsimonious; liberal; profuse. Burke. [ 1913 Webster ]
2. Not merciful or forgiving. [ R. ] Milton. [ 1913 Webster ]
-- Un*spar"ing*ly adv. -- Un*spar"ing*ness, n. [ 1913 Webster ]