Rightfully

Full definition of rightfully

Adverb

1. In accordance with what is right or just; fairly.
• The 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 sufficient warrant. -- John Stuart Mill
2. Rightly, correctly.
• 1590, Edmund Spenser, The Faerie Queene, II.viii:Ne euer will it breake, ne euer bend.
  Wherefore Morddure it rightfully is hight.