The Japanese noun '背中 (せなか)' refers to the 'back' of a person or animal. It specifically denotes the rear part of the body from the neck to the waist. This word is commonly used in everyday conversation and can be used in various contexts, such as describing physical posture, pain, or even metaphorical situations. For example: His back is straight「彼の背中はまっすぐだ」(かれのせなかはまっすぐだ). I have a pain in my back「背中が痛い」(せなかがいたい). The word can also be used metaphorically to describe support or reliance, as in 'I rely on my friend's back'「友達の背中に頼る」(ともだちのせなかにたよる).
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