The name of which African river means "river of rivers" in Tuareg?

The Niger River is the principal river of West Africa, extending about 4,180 km (2,600 mi). Its drainage basin is 2,117,700 km2 (817,600 sq mi) in area. Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Niger Delta or the Oil Rivers, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the third-longest river in Africa, exceeded only by the Nile and the Congo River (also known as the Zaïre River). The Niger has different names in the different languages of the region: Jeliba or Joliba "great river" (Manding), Egerew n-Igerewen "river of rivers" (Tuareg), Orimiri or Orimili "great water" (Igbo).