The root <em>cap</em> is a variant of the primary root word <em>cept</em> that means to take or to receive. <em>Cap</em> only means to take or to seize, and such concept is present in words such as the following:
To captivate: To seize someone with charm or to attract and hold the interest and attention of someone.
Captive: One who has been seized and enslaved.
Captor: One who seizes and enslaves.
To capture: To seize or to get possession of something or someone, usually a criminal.
Capacity: The ability of something, like a box, to take a number of things or persons into it.
