Definitions for unsparingʌnˈspɛər ɪŋ
Random House Webster's College Dictionary
not sparing; liberal or profuse.
Origin of unsparing:
lavish, munificent, overgenerous, too-generous, unsparing, unstinted, unstinting(adj)
"distributed gifts with a lavish hand"; "the critics were lavish in their praise"; "a munificent gift"; "his father gave him a half-dollar and his mother a quarter and he thought them munificent"; "prodigal praise"; "unsparing generosity"; "his unstinted devotion"; "called for unstinting aid to Britain"
not forbearing; ruthless
"an unsparing critic"
Origin: un- + sparing
not sparing; not parsimonious; liberal; profuse
not merciful or forgiving