Having or exercising influence or power.

Roget 157: powerful, puissant; potential; capable, able; equal to, up to; cogent, valid; efficient, productive; effective, effectual, efficacious, adequate, competent; multipotent^†, plenipotent^†, omnipotent; almighty.    forcible etc. adj.. (energetic) 171; influential etc. 175; productive etc. 168.    ... show more

Roget 175: influential, effective; important etc. 642; weighty; prevailing etc. v.; prevalent, rife, rampant, dominant, regnant, predominant, in the ascendant, hegemonical^†.    ... show more

Roget 737: at the head, dominant, paramount, supreme, predominant, preponderant, in the ascendant, influential; arbitrary; compulsory etc. 744; stringent.    at one's command; in one's power, in one's grasp; under control.    ... show more

Dutch: invloedrijk
Polish: wpływowy