Intonation—the rise and fall of pitch in spoken language—is essential in conveying meaning, managing interaction, and expressing emotion. While vocabulary and grammar provide the framework of speech, intonation adds the expressive contour that reveals a speaker’s intentions. This paper examines the diverse roles intonation plays in communication, including its influence on turn-taking, emotional tone, emphasis, and cultural variation. Focusing on research from phonetics, sociolinguistics, and communication theory, the article contends that intonation is a core component of spoken interaction rather than a superficial addition.

Intonation, communication, prosody, emotion, turn-taking, pragmatics, speech melody, discourse functions, intercultural communication, second language acquisition, phonetics, sociolinguistics, speech rhythm, emphasis.

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