compacity
The maximum capacity of something is how much something will hold.
The word is clutch. Note that this is a verb and a noun at the same time.
grip hold
The common word for a mathematical or chemical equation is formula.The word for something well known or recognized is familiar.
to hold something strong
The word is "grip".
grip or cling
grip
A point is a mathematical concept of something which has no dimensions, and which is used to define location.
Grip
contain, meaning hold within something.
Hold?