Origin: Latin suffix -sion
Recursion has 2 different meanings across 1 category:
(mathematics) an expression such that each term is generated by repeating a particular mathematical operation
"The student struggled to grasp recursion because she couldn't see how each number in the sequence was produced by repeatedly applying the same formula."
The act of recurring.
"The endless loop in his code was a form of recursion that kept repeating until he finally broke it."