Influential
Pronunciation : In`flu*en"tial
Part of Speech : a.
Etymology : [See Influence.]
Definition : Defn: 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