noun
mountains; many mountains
Plural or collective use of 山, referring to a range, group, or many mountains rather than one mountain.
遠くに雪をかぶった山々が見える。
Snow-capped mountains can be seen in the distance.
adverb
would really like to; very much;
Most often used in patterns such as 〜たいのはやまやまだが or 欲しいのはやまやまだが, meaning that one strongly wants something but cannot do or have it.
手伝いたいのはやまやまだが、今日は時間がない。
I'd really like to help, but I don't have time today.
adverb
Used adverbially for a large amount, especially in expressions like ことはやまやまある. This use is narrower than the very common 山ほど.
言いたいことはやまやまあるが、今は黙っておく。
There are a lot of things I want to say, but for now I'll keep quiet.