WordReference Random House Unabridged Dictionary of American English © 2025
dis•an•nul 
(dis′ə nul′),USA pronunciation v.t., -nulled, -nul•ling. 
 dis′an•nul′ler, n. 
dis′an•nul′ment, n.
            - to annul utterly;
make void:to disannul a contract. 
- dis-1 + annul 1485–95
 
dis′an•nul′ment, n.