threat, thereat

Threat or threat means a stated intention to do harm or injury, or, generally, a potential harm or injury--
The police considered the threat serious, and went to get an arrest warrant.
The threat of losing his job straightened him right up.

Thereat or thereat is an archaic ( no longer used ) word meaning at that place, or because of that--
"Wide is the gate, and broad is the way, that leadeth to destruction, and many there are who go in thereat."
They gathered around the strange object, and wondered thereat.

Now that you know that, you can say--
"When he heard the king's threat, he told the truth, and the court wondered thereat."