interpose

To interpose means to place yourself or something else between people, objects, or parts of an event, often to prevent harm, stop conflict, offer help, or make a point. It suggests a deliberate act in a situation that is already in progress.

Originally, "interpose" often referred to physically stepping between two sides, perhaps to stop a fight. Over time, it also came to describe less physical acts. You can interpose a question during a presentation, politely cutting in to ask for clarification. A character in a story might interpose a warning before someone makes a mistake.

The word carries a sense of deliberate action. It is not something that simply happens by chance. It implies that someone understands the situation and chooses to become involved. You would not usually say, "The rain interposed itself," but you might say, "He bravely interposed himself between the attacker and his friend."

Sometimes interpose is used with abstract things. For example: "Fate seemed to interpose obstacles in their path," meaning that unexpected difficulties appeared. Or, "She interposed a note of caution into the enthusiastic discussion."

So, whether it's physically stepping in or adding your voice to a conversation, to interpose is to deliberately insert yourself (or something else) into an existing situation, often with a specific purpose in mind.