virtue
vir.tue or in virtue of \'v*r-(.)chu:, -ch*-w\ n [ME virtu, fr. OF, fr. L virtut-, virtus strength, manliness,] virtue, fr. vir man - more at VIRILE 1a: conformity to a standard of right : MORALITY 1b: a particular moral excellence cap 2: an angel of the fifth highest rank 3: a beneficial quality or power of a thing 4: manly strength or courage : VALOR 5: a commendable quality or trait : MERIT 6: a capacity to act : POTENCY 7: chastity esp. in a woman : through the force of : by authority of - by virtue of
Webster's English Dictionary