Webster's Revised Unabridged Dictionary · 1913

Suasion

Suasion , noun

[Latin suasio, from suadere, suasum, to advise, persuade, from suadus persuading, persuasive; akin to suavis sweet: compare Old French suasion. See Suave, and compare Dissuade, Persuade.]

The act of persuading; persuasion; as, moral suasion.