The word IMPERIL means to put someone in a risk of being injured, harmed or destroyed or being endangered.
Imperialism is a policy or ideology of extending the rule over peoples and other countries, for extending political and economic access, power, and control
Countries with monarchy government are those that are ruled by a single person or a single monopolizing bloodline. Some examples of monarchy government countries are the UK, Japan, Thailand, and Norway.
The MONARCHY form of a Government is form of governance by a Monarch or Royal Family.
The word 'monarch' came from the Greek words "monos" which means 'alone', and also "arkhein" which means 'to rule'. So the word was first used to describe rulership.