In the sentence “He is a very good swimmer”, what part of speech is the word very?

In “He is a very good swimmer,” “very” is an adverb, modifying the adjective “good” to indicate degree. Studying this highlights the role of adverbs in intensification, the challenges of grammatical accuracy, and their impact on descriptive language. For Pakistan, this offers lessons on teaching adverbs in English education, enhancing descriptive writing and speaking skills for academic and professional communication.