ruthfully adverb4 •In a manner that is ruthful. •Sorrowfully, ruefully.caesar [ruthfully] Rufio, Rufio: my men at the barricade are between the sea party and the shore party. I have murdered them. — 1898 •Compassionately; mercifully.Lee's wait was ruthfully short, although he might have traded the first news that reached him for a return to uncertainty. — 1999 •In a manner that causes pity; piteously. formsmore ruthfully · most ruthfully