voider
voi·der
noun
1.
an official who can invalidate or nullify
- “my bank check was voided and I wanted to know who the invalidator was”
Origin
From Middle English voider, equivalent to void + -er.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.