The prefix is "ad-" meaning "increase"
What does this even mean chief
There is an envelope marked with the instructions that it is not to be opened until the death or disappearance of Dr. Jekyll. This implies that Dr. Lanyon knew something secret, but was unwilling to reveal it at first. He waited until there was no more "hope" of Dr. Jekyll staying normal.
The King and Queen are the antagonist. If you are looking for that what exactly is the question?