Stay calm please.

Meaning: Politely ask someone to remain relaxed or peaceful in a specific place or position. It's like saying, Please remain relaxed and peaceful.

Choice of Words: Stay is a verb that means to remain in a specific place or position. Calm is an adjective that means relaxed or peaceful. Please is a polite way to make a request. When put together, "Stay calm please" means to politely ask someone to remain relaxed or peaceful in a specific place or position.