void
Pronunciation: /vɔɪd/
adjective
- 1not valid or legally binding: the contract was void
- (of speech or action) ineffectual; useless: all the stratagems you’ve worked out are rendered void
noun
verb
- 1chiefly North American declare that (something) is not valid or legally binding: the Supreme court voided the statute

Origin:
Middle English (in the sense 'unoccupied'): from a dialect variant of Old French vuide; related to Latin vacare 'vacate'; the verb partly a shortening of avoid, reinforced by Old French voider