IPA: /dɪˈkɒlənaɪz/
KK: /dɪˈkɑːlənaɪz/
To remove colonial control or influence from a country or region, allowing it to become independent.
The country worked hard to decolonize and establish its own government.
Past: decolonized
Past Participle: decolonized
Decolonize is formed from "de-" (meaning removal or reversal) and "colonize" (from Latin "colonia" meaning settlement or colony). The word means to remove or reverse the process of colonization, restoring autonomy to a previously colonized area.
Think of 'removing' ('de-') the 'settlement' ('colonize') to remember that decolonize means to reverse colonization.