INFLUENTIAL
influential
(adjective) having or exercising influence or power; “an influential newspaper”; “influential leadership for peace”
Source: WordNet® 3.1
Etymology
Adjective
influential (comparative more influential, superlative most influential)
Having or exerting influence.
Synonyms
• swayful
Noun
influential (plural influentials)
A person who has influence
Source: Wiktionary
In`flu*en"tial, a. Etym: [See Influence.]
Definition: Exerting or possessing influence or power; potent; efficacious;
effective; strong; having authority or ascendency; as, an influential
man, station, argument, etc.
A very influential Gascon prefix. Earle.
Source: Webster’s Unabridged Dictionary 1913 Edition