in·val·i·date 
(ĭn-vălĭ-dāt′)
(ĭn-vălĭ-dāt′)tr.v. in·val·i·dat·ed, in·val·i·dat·ing, in·val·i·dates
To make invalid; nullify.
in·val′i·dation n.
in·vali·da′tor n.
- anti-art
- antiatom
- antibacterial
- antiballistic missile
- antibaryon
- Antibes
- antibiosis
- antibiotic
- antibiotically
- antibody
- antibusiness
- antic
- antically
- anticancer
- anticancerous
- anticatalyst
- anticathode
- antichlor
- anti-choice
- anticholinergic
- anticholinesterase
- antichrist
- anticipant
- anticipatable
- anticipate