invalid
transitive verb
Adjective (1)
Adjective (2)
Latin invalidus weak, from in- + validus strong — more at valid
Latin & French; French invalide, from Latin invalidus
1542, in the meaning defined above
Noun
1701, in the meaning defined above
Verb
1787, in the meaning defined at sense 1
1642, in the meaning defined at sense 1
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