Take a deep breath.
Meaning: This means to breathe in a lot of air.
Choice of Words: Take is a verb that means to grasp or hold something. Deep is an adjective that describes something as being of great depth or intensity. Breath is a noun that refers to the air that is inhaled and exhaled in respiration. When you put them together, "Take a deep breath" means to grasp or hold a great depth or intensity of air in respiration.
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Related Expressions