decertify

/diหหˆsษœหtษชfaษช/

IPA: /D IY0 S ER1 T AH0 F AY0/

verb
  1. 1

    To annul the certification of.

  2. 2

    (industrial relations) To annul a labor union.

Source: https://en.wiktionary.org/wiki/decertify