ワンウェイ

noun which may take the genitive case particle 'no'

one-way

Used as a no-adjective to describe something that moves or operates in a single direction, such as traffic, tickets, or communication.

• この通とおりはワンウェイです。

  This street is one-way.

• ワンウェイの切きっ符ぷを買かいました。

  I bought a one-way ticket.