unqualify
/(ˌ)ʌnˈkwɒlɪfʌɪ/ /(ˌ)ʌŋˈkwɒlɪfʌɪ/verb
[with object] To make unqualified; to disqualify.
- Common in the late 17th and 18th centuries..
Origin
Mid 17th century; earliest use found in Edward Reynolds (1599–1676), bishop of Norwich. From un- + qualify.