Adjectives – gradable and non-gradable

Most adjectives are gradable. This means we can have different levels of that quality. For example, you can be 'a bit cold', 'very cold' or 'extremely cold'. We can make them weaker or stronger with modifiers

She was quite angry when she found out.
The film we saw last night was really funny!
It can be extremely cold in Russia in the winter.

Some adjectives are non-gradable. For example, something can't be 'a bit finished' or 'very finished'. You can't be 'a bit dead' or 'very dead'. These adjectives describe absolute qualities. To make them stronger we have to use modifiers like 'absolutely', 'totally' or 'completely':

Thank you, I love it! It's absolutely perfect!
Their farm was totally destroyed by a tornado.
My work is completely finished. Now I can relax.

Adjectives like 'amazing', 'awful' and 'boiling' are also non-gradable. They already contain the idea of 'very' in their definitions. If we want to make extreme adjectives stronger, we have to use 'absolutely' or 'really':

Did you see the final match? It was absolutely amazing!
After 32 hours of travelling, they were absolutely exhausted.
My trip home was really awful. First, traffic was really bad, then the car broke down and we had to walk home in the rain.