mass noun
a major branch of the Niger-Congo family of languages, spoken mainly in Nigeria and including Efik and Fula
贝努埃-刚果语族（尼日尔-刚果语系的主要分支, 主要用于尼日利亚, 包括埃菲克语和富拉语）。
of, relating to, or denoting this group of languages
（与）贝努埃刚果语（有关）的。
词源
from the names of rivers.