adverb equivalent; adverbial equivalent
A grammatical term for a phrase or clause that functions like an adverb, even if it is not a single-word adverb. Used in linguistic analysis and grammar explanations.
An 'adverb equivalent' is a phrase that functions like an adverb in a sentence.
In this grammar book, 'in the rain' is given as an example of an adverbial equivalent.
Compound of 副詞 (adverb) + 相当 (equivalent) + 語句 (phrase). A technical term coined in Japanese linguistics.