ní + ẹsẹ̀kẹ́sẹ̀, ultimately from ẹsẹ̀ (“foot”) + -kí- (“infix”) + ẹsẹ̀ (“foot”)
lẹ́sẹ̀kẹ́sẹ̀ or lẹ́sẹ̀kẹsẹ̀