The peasant bowed before his liege, the king, and begged for forgiveness for stealing the gruel.
While servants pledged their loyalty to the liege, they did not always like him or respect him.
The peasant bowed before his liege, the king, and begged his forgiveness for stealing the gruel.
disloyal, unfaithful
The word "liege" can be a noun or an adjective (meaning loyal). There does not seem to be an adverb form, but you could use a prepositional phrase instead.
"The barbarians are at our portcullis, my liege, shall I order the archers to take their positions?"
There is one syllable.
Can you use the word concluding in a sentence? Done.
You can use the word Truss in a sentence like this.
Just use it! Or do you mean, can you use the word beheld in a sentence.
liege
Servant
The most nearly opposite word to "liege" would be "servant" as a liege is someone who owes loyalty to a superior, whereas a servant is someone who serves others.