IPA: /ˌoʊvərˈsɛntrəˌlaɪzd/
KK: /oʊvərˈsɛntrəˌlaɪzd/
Having too much power or control concentrated in a single authority or organization.
The company's overcentralized structure made it difficult for local managers to make decisions.
Overcentralized → It is formed from "over-" (meaning excessively) and "centralized" (from "central" which comes from Latin "centralis", meaning pertaining to the center, and the suffix "-ize" meaning to make). The word describes a system that is excessively focused on a central authority or control.
Think of something being controlled 'excessively' ('over-') from a 'center' ('centralized') — that's why overcentralized means too much control from the center.