IPA: /ˌɛkspəˈnɛnʃəl/
KK: /ɛkˈspəʊnɛnʃəl/
Relating to a mathematical expression that involves an exponent, often indicating rapid growth or increase.
The company's profits showed exponential growth over the last year.
Exponential → It is formed from "ex-" (meaning out of or from) and "ponere" (meaning to place or put). The word describes a mathematical function where a quantity grows rapidly as it is placed out or expanded.
Think of something that grows 'out of' ('ex-') control as it is 'placed' ('ponere') in a mathematical context — that's why exponential refers to rapid growth.