バストbasuto

1. nounbust (measurement)
2. nounbreasts; bosom
3. nounbust (sculpture); half-length portrait

• Synonym乳房ちぶさNeutralFormal, medical term for the breasts; suits clinical or serious prose, not the clothing-size contexts of 「バスト」.
• Synonym胸むねNeutralThe most versatile of the set: chest, breasts, or the heart and feelings; much broader than 「バスト」, which centers on bust size.
• Related乳ちちNeutralNative word for milk that also means breasts, as in 「乳を飲ませる」; unlike 「バスト」 it has nothing to do with bust measurements.
• RelatedおっぱいCasualNursery word for breasts or breast milk; colloquial, with an affectionate or crude feel, unlike the neutral 「バスト」.
• Related雄っぱいおっぱいCasualInternet slang for a man's well-developed pecs; purely a joking term, far from the neutral tone of 「バスト」.

「バスト」 is the default for bust measurements in clothing (「バストサイズ」) and for bust sculptures. For the chest or feelings in general use 「胸」; in formal or medical writing 「乳房」; for milk 「乳」. 「おっぱい」 is colloquial nursery speech; 「雄っぱい」 jokes about men's pecs.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 胸像きょうぞう。
2. 胸部きょうぶ。
3. （女性じょせいの）胸囲きょうい。