The kanji 乳 primarily represents "milk" or "breast." It is closely associated with nourishment, particularly the milk produced by mammals, and by extension, the breasts of females. This kanji evokes concepts of infancy, nurturing, and the sustenance of life.

・On-yomi (音読み): nyū ・Kun-yomi (訓読み): chichi

⚫︎ 牛乳 (ぎゅうにゅう) Translation: Milk (cow's milk) ⚫︎ 乳児 (にゅうじ) Translation: Infant ⚫︎ 乳癌 (にゅうがん) Translation: Breast cancer

The kanji 乳 is a pictograph. The character visually depicts the shape of breasts with a depiction of milk or the flow of milk from it. The top portion may represent the upper part of the breasts, and the lower horizontal stroke may be the part from where the milk flows. Over time, the form has simplified but retains its core meaning.