What is asl sign language word for king?

There isn't a single, specific sign for "king" in American Sign Language (ASL). Instead, you would sign it as:

"RULER" + "MAN"

* RULER: You would sign this by tracing the shape of a crown on your forehead with your dominant hand.

* MAN: This is the standard sign for "man" using a fist with the thumb pointing up.

So, you would sign "king" by signing "ruler" then immediately following with "man". The order of the signs is important for understanding the meaning.