Adjective Intensifiers

Adjective modifiers, also called intensifiers, are words which are placed before adjectives to give additional detail and emphasis to them. They are mostly used in oral speech to make it more vivid and emotional. There are such well-known intensifiers as: very, really, absolutely, totally, etc.

Level: HIGH

1. Extremely
2. Completely
3. Absolutely
4. Utterly
5. Totally
6. Entirely
7. Exceptionally
8. Insanely
9. Incredibly
10. Highly

Examples:

1. The film was absolutely awful.
2. He was an exceptionally brilliant child.
3. He was highly intelligent.
4. She’s a highly successful businesswoman.

Level: MEDIUM

1. Particularly
2. Really
3. Very
4. Pretty
5. Quite

Examples:

1. The food smelled really disgusting.

Level: LOW

1. Somewhat
2. Mildly
3. Relatively

Reference:
https://learnenglish.britishcouncil.org/english-grammar/intensifiers