"He had come like a thief in the night." is taken from the Bible, specifically Thessalonians 5:2. It refers to the second return of the Lord (Jesus), that means another one from the one we know. The first one is his rebirth after beeg crucified. He will return as "a thief in the night" because we don't know when it will happen, he won't announce it.
Answer:
This medicine is derived from a tropical plant.
The prefix over means too much.
This is a correlative conjunction which means that it connects the words together. This relates both the words lumber and nails and how they carried both.