à l'insu de

without the knowledge of

→ à
phrase Rare #52,495
without the knowledge of Used when someone does something without another person knowing about it.
FR: Elle est partie à l'insu de ses parents.
EN: She left without her parents knowing.

Depuis un an, à l'insu de sa famille, il dirige un réseau de résistance.

For the past year, without his family’s knowledge, he has been running a resistance network.

— Gramps Is in the Resistance (1983)

À l'insu de M. Andermatt ?

Without Mr. Andermatt’s knowledge?

Je me suis consacré à mon pays, à l'insu de tous.

I devoted myself to my country without anyone knowing.

— Full River Red (2023)