also: むなぢ
noun
Archaic or poetic word for breasts. In modern Japanese, 胸 (むね) or 乳房 (ちぶさ) are used instead.
古い和歌では「むなち」が女性の胸を指すことがある。
In old waka poems, 'munachi' can refer to a woman's breasts.
Historical kana spelling; not used in modern writing.
Compound of 胸 (muna, 'chest') + 乳 (chi, 'milk, breast'). The exact historical derivation is uncertain.