correlative
Linguistics term for paired words that relate to each other in a sentence, such as 'either...or' or 'both...and'.
相関詞は、二つ以上の語が呼応して働く表現です。
Correlatives are expressions in which two or more words work in correspondence.
Compound of 相関 (correlation) and 詞 (word, part of speech). The exact historical derivation is uncertain; the term is used in modern linguistics.