rightfully

adv

1. In accordance with what is right or just.

   “Near-synonym: fairly”

   “[T]he only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others. His own good, either physical or moral, is not a sufficient warrant.”

2. Rightly, correctly.

   “Ne euer will it [King Arthur's sword] breake, ne euer bend. / Wherefore Morddure it rightfully is hight.”