Jibu/majibu comes from Arabic أَجَابَ (ʾajāba, "to respond").
Swahili as a whole has Arabic origin. Arabs + East African coastal people = Swahili people
I typed "I like your answer " I was graded wrong and given the same answer l wrote as the correct answer. This must be a bug.
"exellent, Sherriff. I like your thinking."