Translation guide
The part of the arm between the shoulder and the elbow. In Japanese, this is most commonly expressed with the word 二の腕 (にのうで), but other terms exist depending on context.
Referring to the upper arm as a body part in everyday conversation.
Talking about sleeve length, arm circumference, or fit of clothing.
Refers to the circumference of the upper arm, often used in tailoring or fitness.
Expressions involving the upper arm in a non-literal sense.
Literally 'to stroke one's upper arm', an idiom meaning to be proud of one's strength or to show off one's muscles.
The most common and natural word for 'upper arm' in Japanese. Used in daily life, health, and beauty contexts.
Please tell me exercises to slim down the upper arms.
She has a tattoo on her upper arm.
Anatomical/medical term for 'upper arm'. Used in formal or technical contexts.
The biceps brachii is the muscle that makes the bulge.
General word for 'arm'. Can refer to the whole arm or upper arm depending on context. Use when the distinction is clear.
I'm bothered by my thick arms.
This jacket is tight around the upper arms.
Sleeve length. Not specifically 'upper arm', but used when discussing how far a sleeve extends on the arm.
The sleeves are too short and my upper arms show.
He's proud of his strength and often strokes his upper arm.