Which term refers to setting aside something as void?

The term that refers to setting aside something as void is "quash." In legal contexts, to quash means to annul or make legally void a legal proceeding, order, or decision. This can apply to court judgments, subpoenas, or other legal documents that are deemed invalid or without legal effect. Quashing is often used in cases where it is determined that a legal action does not comply with necessary legal standards or procedures, thereby negating its validity.

Other terms listed, such as mortgagee and mortgagor, relate to the context of real estate and lending. A mortgagee is the lender in a mortgage agreement, whereas a mortgagor is the borrower. Separate maintenance refers to a legal judgment or agreement that provides for financial support to one spouse while the couple is living separately, typically without the legal dissolution of marriage. None of these terms hold the meaning of making something void, highlighting why quash is the correct response.