BENEFICIALLY
beneficially
(adverb) in a beneficial manner; “this medicine will act beneficially on you”
Source: WordNet® 3.1
Etymology
Adverb
beneficially (comparative more beneficially, superlative most beneficially)
In a beneficial manner
Source: Wiktionary
Ben`e*fi"cial*ly, adv.
Definition: In a beneficial or advantageous manner; profitably; helpfully.
BENEFICIAL
Ben`e*fi"cial, a. Etym: [Cf. F. bénéficial, LL. beneficialis.]
1. Conferring benefits; useful; profito.
The war which would have been most beneficial to us. Swift.
2. (Law)
Definition: Receiving, or entitled to have or receive, advantage, use, or
benefit; as, the beneficial owner of an estate. Kent.
3. King. [Obs.] "A beneficial foe." B. Jonson.
Syn.
– See Advantage.
Source: Webster’s Unabridged Dictionary 1913 Edition