Lookup and identify the word in the sentence
She was aghast at his lack of consideration.
The word "aghast" means to be filled with horror, shock, or dismay.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Lookup and identify the word in the sentence

### Response:
The word "aghast" means to be filled with horror, shock, or dismay.