Which term suggests that something is done secretly or discreetly?

The term "sub rosa" is derived from Latin, meaning "under the rose." Historically, the rose was a symbol of secrecy and confidentiality, often used in various contexts to indicate that a conversation or action is to remain hidden or confidential. This term is frequently employed in legal and business environments to denote activities that are conducted privately or out of the public eye.

The other terms presented do not convey the same notion of secrecy. For instance, "supra" typically refers to something that is above or beyond and does not imply discretion. "Ux" is an abbreviation commonly associated with 'wife' in legal contexts, but it lacks any connection to secrecy. "Status quo ante" refers to the previous state of affairs before a change occurred, focusing on restoration rather than concealment. Thus, "sub rosa" is the most appropriate term to suggest actions taken discreetly.