The description of Nag in the text evokes an image of him being frightening through several elements:
1. **Physical Attributes:** The text doesn't provide a detailed physical description of Nag, but it hints at his intimidating size and presence. Snakes, in general, can be quite large, and this fact alone can be frightening to many people.
2. **Behavior:** The mention that Nag "fell out of the nest" implies that he is a formidable snake. The fact that he survived such a fall suggests resilience and strength, making him appear more dangerous.
3. **Descriptive Language:** The author uses descriptive language to create a vivid image of Nag. Phrases like "evoke feelings of eyes" suggest that Nag's eyes are particularly menacing. The use of the word "sound" may allude to his hissing or the noise associated with snakes, which can be eerie.
4. **Darzee's Fear:** The fact that Darzee explains Nag's dangerous nature adds to the sense of fear. When a character within the story acknowledges another character's danger, it heightens the reader's perception of that character's threat level.
In summary, the combination of physical attributes, behavior, and descriptive language in the text creates an image of Nag as a frightening and dangerous character, making the reader view him with apprehension and caution.