In Estonian grammar, pronouns and determiners play a significant role in structuring sentences and indicating relationships between words. Pronouns are used to replace nouns and provide a sense of continuity in the discourse. They can refer to people, objects, or concepts and can be divided into personal, demonstrative, interrogative, relative, and indefinite pronouns.

Personal pronouns express the grammatical person (first, second, or third) and number (singular or plural). They are used to indicate the subject or object of a sentence. Demonstrative pronouns indicate proximity or distance in relation to the speaker, such as “this” or “that.” Interrogative pronouns are used to ask questions, like “who,” “what,” or “where.” Relative pronouns link two clauses together, such as “who” or “which.” Indefinite pronouns refer to non-specific people or things, like “someone” or “something.”

Determiners, on the other hand, modify nouns and specify their quantity or definiteness. They agree with the noun in case, number, and definiteness. Examples of determiners in Estonian are “see” (this), “iga” (every), “mõni” (some), and “mitu” (several). Understanding the use of pronouns and determiners is essential for mastering Estonian grammar and expressing oneself accurately in the language.