impellent การใช้

He managed to restore impellent activity and speech after all three strokes.
It may affect the primary, substantial reason or motive of the grant, or constitute merely a secondary or impellent cause of the concession.
Shortly after 1700 the mine may have been one of the few sites to trial Thomas Savery's pump, which was, according to his patent application, " A new invention for raise ing of water & by the impellent force of fire, which will be of great use and advantage for drayning mines & ".