IPA: /ˈkæptər/
KK: /ˈkæptər/
A person who takes someone else prisoner or holds them against their will.
The captor demanded a ransom for the release of the hostage.
Captor → It is formed from "capere" (meaning to seize or take) and the suffix "-or" (meaning one who). The word "captor" refers to one who seizes or takes someone, typically in the context of abduction or capture.
Think of someone who 'seizes' ('capere') another person — that's why a captor is someone who takes or holds someone captive.