Wiktionary
vb. (en-archaic third-person singularact)
Usage examples of "acteth".
He that acteth two parts is the more borne withall if he come short, or fayle in one of them.
Senator, who acteth so well the spy for favor of Spain, would do honor to a ducal secretary, for accuracy of information concerning weighty private matters before the Council!
Writes BERNARD of TREVISAN: "For the Matter suffereth, and the Form acteth assimulating the Matter to itself, and according to this manner the Matter naturally thirsteth after a Form, as a Woman desireth an Husband, and a Vile thing a precious one, and an impure a pure one, so also Argent-vive coveteth a Sulphur, as that which should make perfect which is imperfect: So also a Body freely desireth a Spirit, whereby it may at length arrive at its perfection.