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"
generous and tireless with one's contributions of time, money, etc.