asymptote
/æsˈimptət, -ˈɪm-/Definitions
1. noun
A line or curve that a function approaches but does not touch, typically as the input values approach a particular point.
“The graph of the function has a horizontal asymptote at y = 0.”
2. verb
To approach or approximate something closely, but not necessarily reach it.
“The researcher asymptoted the solution to the problem using advanced mathematical techniques.”