真ま隣となり

noun which may take the genitive case particle 'no', noun

immediately adjacent; right next to

Describes something being directly next to another thing, with no space in between. Often used with の to modify a noun.

• 彼かれの家いえは私わたしの家いえの真ま隣となりだ。

  His house is right next to mine.

• 真ま隣となりの席せきに座すわっている人ひとは誰だれですか。

  Who is the person sitting in the seat immediately next to me?