beneficial
ben-uh-FISH-uladjMeaning helpful; producing good results
Memory hook a BENE-FISH-al fish. A fish that sweeps the sea floor clean helps every creature around it; its work is beneficial.
Reading aloud every evening proved beneficial to her spelling.
In context The new bus route proved beneficial to the whole neighborhood: workers reached their jobs faster, and the shops near each stop saw more customers.
Similar helpful, useful, advantageous, valuable
Opposite harmful, detrimental, damaging
From Latin beneficium, “a kindness, a favor”: bene (well) + facere (to do).