asymptotical
/ˌæsɪmptɒˈtɪkəl/Definitions
1. adjective
relating to or characterized by an asymptote, especially in a mathematical function or curve
“The asymptotical behavior of the algorithm made it efficient for large inputs.”
2. adverb
in a manner that approaches an asymptote
“The graph behaves asymptotically as x approaches infinity.”