The word "宝贝儿" is formed by combining the characters "宝" (bǎo), meaning "precious", and "贝" (bèi), meaning "shell" or historically "currency", into the compound "宝贝", which translates to "treasure". The suffix "儿" (ér) is then appended, functioning as a diminutive marker in Mandarin to add a colloquial and affectionate tone, resulting in a term of endearment.