beneficial (adj.)

mid-15c., "helpful, advantageous, conferring benefit," from Middle French bénéficial and directly from Latin beneficialis "pertaining to a favor," from beneficium "a favor, service, kindness," from beneficus "generous, kind, benevolent, obliging," from bene- "good, well" (see bene-) + -ficus "making, doing," from -ficere, combining form of facere "to do, to make" (from PIE root *dhe- "to set, put"). Related: Beneficially.