set in
Obere Mittelstufe (B2) neutral
When something bad (like cold weather, infection, or boredom) starts and looks like it will continue for a while.
"The doctors were concerned that infection had set in after the operation."
When something bad (like cold weather, infection, or boredom) starts and looks like it will continue for a while.
"The doctors were concerned that infection had set in after the operation."