demonstrative adverb
A grammatical term for adverbs that indicate manner or degree in relation to the speaker, such as こう, そう, ああ, どう.
「こう」「そう」「ああ」「どう」は指示副詞に分類される。
こう, そう, ああ, and どう are classified as demonstrative adverbs.
Compound of 指示 (demonstrative) and 副詞 (adverb). A modern linguistic term.