Which properly distinguishes ʿaks and rujūʿ?

Muzāwajah, ʿAks, Rujūʿ, Tawriyah and Istikhdām

• ʿAks needs a polysemous pronoun
• Rujūʿ intends a remote sense
• Both mean negative antithesis
• ʿAks reverses order; rujūʿ negates an earlier assertion