UNSTINTING
lavish, munificent, overgenerous, too-generous, unsparing, unstinted, unstinting
(adjective) very generous; “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”
Source: WordNet® 3.1
Etymology
Adjective
unstinting (comparative more unstinting, superlative most unstinting)
generous and tireless with one's contributions of time, money, etc.
Source: Wiktionary