Calculus - Mathematics which follows the "movement of changes" between variables.
kal - movement, to go after, to count,
kul - adjective suffix, like "vi-aa - ay -kul", worried as "vi" - is to undertake, "aa" is towards, "ay" is indicative of movement here, and "ku" is the suffix for adjective, which means "something that makes follow towards (something)" - which is when someone is worried. It also means to proceed continuously as well as count.
uh - suffix for generic root.
which means "something that counts movements", which is what "Calculus" is about, and see the postings Did Newton Lie" and Newton Stone .