This is the 715th most frequent Greek word.
επέμβαση
Intervention or operation.
Here, "επέμβαση" is used to refer to a medical procedure or surgery.
Η επέμβαση του γιατρού ήταν επιτυχής.
The surgeon's intervention was successful.
In this sentence, "επέμβαση" means an act of interfering or intervening in a process or system.
Η επέμβαση του κράτους στη λειτουργία της αγοράς ήταν αμφιλεγόμενη.
The state's intervention in the functioning of the market was controversial.
Here, "επέμβαση" is used to describe someone joining or interrupting an ongoing discussion or activity.