The phrase "king in" seems to be a typo or an incorrect phrase. It could potentially refer to "king," which is a term used to describe a male monarch or ruler of a kingdom. In a broader context, it can also mean someone who has dominion, power, or superior status in a particular area or field, often used metaphorically.
The word "king" originates from Old English "cyning," which is derived from Proto-Germanic "*kuningaz," meaning "descendant" or "king." It reflects a term for a chief or one who rules over a people or territory.
If "king in" was meant to imply a specific phrase or term, please clarify, and I would be happy to provide further assistance!