To foretell something is to say or write what will happen in the future. When you foretell a disaster, you are warning people about what will happen.
A sprig is a small branch or twig. It's often used to describe something that is small and insignificant.
slyly means with a hidden or sly intention. When she slyly looked away, she was trying to avoid his gaze.
To flicker is to blink rapidly, to turn on and off very quickly. When the light flickers, it looks like it's flickering.
A craggy surface is rough and uneven. This is usually the result of erosion, which is the process of removing something from the Earth's surface.
Cackle is the sound that someone makes when they are laughing. It's usually a very high-pitched sound.
To accost someone is to speak to them aggressively or threaten them. You might accost someone on the street to try to get them to stop doing what they're doing.
To wriggle is to move around in a way that is uncomfortable or uncomfortable to the point of being painful. When you wriggle, you are trying to get out of something or to move to a more comfortable position.
To douse something is to pour a lot of water on it. When you douse a fire, you are trying to put it out.