I cannot find any Swahili word meaning gorilla. I did learn that the Swahili word for monkey is tumbili or tumbiri or kima, and the word for baboon is nyani (and for "big" baboon nyani mkubwa) and the word for Colobus monkey is mbega, and the word for chimp is sokwe, and the word for small black monkey is ngedere ... none of which has jack squat to do with gorillas or mogambo. The time spent was justified entirely by learning that "Wapi choo?" in Swahili means "Where is the bathroom?" Research continues as the hope of success dwindles.