Kukana

Kukana (to fight with words) kutaudzana kusina mashoko matsvene. 

Kukanidza (to contradict).

Mitauro yeAfrika

Zigula inoti kukana (deny, denying; reject; contradict). Sokuti: Simkana Mwaliko. (I denied [knowing] Mwaliko).
Zigula inoti kukanana (deny each other, argue with each other; contradict each other).
Uyo Ibibio inoti kan (deny, refute, prove innocent) kureva kukana. Mamwe mazwi: ekana (n. denial).