S: (n) force (a powerful effect or influence) "the force of his eloquence easily persuaded them"
S: (n) grip, grasp (an intellectual hold or understanding) "a good grip on French history"; "they kept a firm grip on the two top priorities"; "he was in the grip of a powerful emotion"; "a terrible power had her in its grasp"
W: (v) force [Related to: force] (to cause to do through pressure or necessity, by physical, moral or intellectual means) "She forced him to take a job in the city"; "He squeezed her for information"