Both Mitigators and intensifiers are the subsets of adverbs of degree and function like adverbs. These are also called adverbials. Basically, mitigators are used to moderate the intensity; whereas, intensifiers increase the strength of words they qualify…
•Slightly •Fairly •Rather •A bit •A little, etc.
Mitigators are commonly used to modify the intensity of adverbs and adjectives in the sentence.
Examples of Mitigators in the sentence :–
•Today, the sky is slightly overcast.
•Our last tour was pretty good .
•The performance of his party is fairly nice, but not as per expectations of leaders.
•It is a nice bat, but a little expensive.
•He isn’t enthusiastic but rather boring.
•The picnic was a bit boring.
•Today, it is slightly humid and moist.
In all the examples, mitigaters–slighty, pretty, fairly, a little, rather, and a bit are used to moderate the meanings of overcast, good, nice, expensive, boring ,and humid respectively.
In the simple words, Mitigators are useful in moderating the extremity of other adverbs, as well as adjectives.
As I mentioned earlier that Mitigators are used to moderate the extremity of adverbs and adjectives; whereas, intensifiers are preferred to increase the strength of adverbs and adjectives.
Examples of intensifiers
•exceptionally •extremely •really •remarkably •incredibly •very, etc.
Similar to Mitigators, intensifiers are also used to modify adverbs and adjectives only.
Examples of intensifiers in the sentence:-
•The sky is very dark and cloudy.
•His attempt was exceptionally good.
•The Taj Mahal is incredibly attractive.
•All the teammates played remarkably well to win the game.
•This summer is extremely hot and dry.
•The picnic was really enjoying.
•The temperature is extremely humid and hot.
Here too, all the examples — very, exceptionally, incredibly, remarkably, extremely, really, are used to increase the power and strength of respective adjectives and adverbs as per the requirement of the context.
Clearly, both are opposite of each other in the use and meaning. Therefore, both complement each other in making moderate and extreme meaning of given words in the sentences.