-f(ə)lē, -li adverb
Etymology: Middle English rihtfully, rightfully, from rihtful, rightful + -ly
1. : in accordance with right or justice : fairly , justly
no man can rightfully be condemned without reference to some definite law — S.T.Coleridge
2. : in a correct or proper manner : rightly
those things which we dread … so rightfully — Key Reporter