Regicide

By Deane Barker

Definition: the killing of a king

The “reg” comes from “regal.”

It’s unclear whether this specifically refers to assassination, coup, or execution. The Wikipedia page uses examples of all three.

Why I Looked It Up

In The LEGO Story:

The had been owned by a notorious figure […] who was convicted of regicide at Finderup Lade, stripped of his estate, and declared an outlaw.

Postscript

Added on

In 100 Things You Will Never Find:

In 1649, [Cromwell] because one the regicides – signatories to the order that saw King Charles I beheaded.