Prefix used in words related to birth or the first time something happens, such as 産声 (first cry of a newborn) or 産湯 (first bath of a newborn). Not freely productive.
We heard the baby's first cry.
There is a tradition of giving a newborn its first bath.
うぶ specifically describes inexperience in romantic or worldly matters, whereas ナイーブ is broader and can also mean emotionally sensitive.
生 (うまれ) is a standalone noun meaning 'birth' or 'origin', whereas 産 (うぶ) is a bound prefix that only appears at the front of specific birth-related words like 産着.
downy hair; peach fuzz; vellus hair · lanugo
first cry of a newborn baby
newborn baby clothes; baby clothes
newborn; newborn baby
shrine parishioner
The prefix うぶ is related to the verb 生む (うむ, 'to give birth'). The exact historical derivation is uncertain, but it is conventionally associated with birth and first experiences.
guardian deity of childbirth, newborns, and one's birthplace
guardian deity of one's birthplace
thanksgiving rice dish after childbirth