IPA: /ˌoʊvərɪkˈspænʃən/
KK: /oʊvərɪkˈspænʃən/
The act of growing or increasing too much, especially in a way that cannot be maintained.
The company's overexpansion led to financial difficulties when demand decreased.
Overexpansion → It is formed from "over-" (meaning excessively) and "expansion" (from Latin "expandere", meaning to spread out). The word describes the act of spreading out excessively or beyond limits.
Think of something spreading out 'excessively' ('over-') — that's why overexpansion means spreading too much.