わ〜わ~and ~and, Keep ~ing, One after another, So much, So many, One after the other

わ is an adverbial particle that is commonly used in cases of stress of emphasis in Japanese. When appearing after the dictionary form of a verb that is being repeated, it highlights a large amount, something happening successively, or more and more. It will often be translated as 'more and more (A)', '(A) keeps on happening', or 'so much (A)'. わ～わ may be used either positively or negatively.

To use this structure, simply place わ after the verb, and then repeat the same verb with a second わ.

わ～わ primarily emphasizes the speaker's surprise in regard to the amount or extent of (A). This structure is predominantly used by men, but it may also sometimes be used by women. However, there are several different variations of わ depending on where they appear in sentences, each of which have gender usage tendencies that will need to be learned.

In many cases where a する verb is being used with わ～わ, the second instance of the action will be omitted, with する appearing by itself. For example, instead of 勉強(べんきょう)するわ勉強(べんきょう)するわ, 勉強(べんきょう)するわするわ would be used.

Fun Fact

わ is simply an emphatic version of the usual は adverbial particle, and originates from は being changed to わ. Due to this, the literal meaning can be thought of as a stronger version of the standard 'as for (A)' meaning of は. This would come across something like 'as for (A), it did (A)', with the repetition itself adding to the emphasis.