What term describes a strong dialectal accent?

The term that describes a strong dialectal accent is "brogue." A brogue specifically refers to an Irish accent or a strong distinctive regional accent, particularly associated with the English spoken in Ireland. It is often characterized by unique phonetic features that can set it apart from other accents of English, making it recognizable and markedly different.

This term is often used in literature and conversation to evoke characteristics of speech that reflect someone's regional or cultural background, enhancing the listener's understanding of the speaker's origin. Other terms in the question relate to different aspects of speech. "Dialect" refers to a particular form of a language specific to a region or social group. "Accentuation" involves the emphasis placed on certain syllables or words in spoken language, and "inflection" pertains to changes in the form of words to express grammatical functions. Therefore, "brogue" stands out as the most precise term to describe a strong dialectal accent.