Adjective modifiers are words that modify or describe adjectives. They can be adverbs, which are words that modify verbs, adjectives, or other adverbs. Adverbs typically end in '-ly' and provide more information about how an action is performed or how an adjective is described. For example, 'QUICKLY' is an adverb that modifies the adjective 'QUICK'. Adverbs can also be used to modify other adverbs, such as 'VERY QUICKLY'. Adjective modifiers can also include intensifiers, which are words that emphasize the intensity of an adjective. Intensifiers include words like 'VERY', 'EXTREMELY', and 'REALLY'.