Meaning of the word "must is a king's word" in English

What does "must is a king's word" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

must is a king's word

US /mʌst ɪz ə kɪŋz wɜːrd/
UK /mʌst ɪz ə kɪŋz wɜːd/
"must is a king's word" picture

Idiom

used to emphasize that a command or requirement is absolute and must be obeyed without question

Example:
You cannot refuse this order; must is a king's word.
In this household, when father says so, must is a king's word.