孳乳 Traditional form: 孳乳 Pinyin (reading): zīrǔ Definitions: to multiply (kinds, difficulties) to reproduce to derive (compounds) Characters: 孳 - to breed; to produce, to bear; to grow recklessly 乳 - breast, nipples; milk; to suckle Traditional characters: 孳 - to breed; to produce, to bear; to grow recklessly 乳 - breast, nipples; milk; to suckle