undeclare
verbEtymology From un- + declare.
1
To reverse the process of declaring; to unsay.
- The Constitution gives Congress the power to declare war; but does that include the power to undeclare it?2007 February 4, Noah Feldman, “Whose War Powers?”, in New York Times:
2
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences To revoke the declaration of (a variable, namespace, etc.) so that it is no longer available.