IPA: /dɪˈkɒleɪt/
KK: /dɪˈkɒleɪt/
To remove the head from a body or to separate copies of printed materials.
The ancient ritual involved the act to decollate the defeated enemy.
Past: decollated
Past Participle: decollated
Decollate is formed from "de-" (meaning down or away) and "collare" (meaning to collar or to bind). The word describes the act of removing or cutting off the head, as if taking away the collar that binds it.
Think of 'removing' ('de-') something that 'binds' ('collare') — that's why decollate means to cut off the head.