interrogative pronoun

(grammar) A pronoun used in a question. In English, the five interrogative pronouns are what, which, who, whom, and whose (also used as relative pronouns). These require no antecedent.

Japanese Meaning

疑問文で用いられる代名詞のこと。例えば、「what」「which」「who」「whom」「whose」などがあり、これらは文中で質問を形成する際に使われ、先行詞を必要としない。

What is this buttons?

An interrogative pronoun such as 'who' or 'what' can begin a question and does not require an antecedent.

Google Translation / DeepL Translation

「who」や「what」などの疑問代名詞は疑問文の先頭に来ることがあり、先行詞を必要としません。

Details

Sense（1）

(grammar) A pronoun used in a question. In English, the five interrogative pronouns are what, which, who, whom, and whose (also used as relative pronouns). These require no antecedent.