What is pun in arm in keeping quiet?

In Pablo Neruda's poem "Keeping Quiet," the phrase "pun in arm" refers to the idea of creating a connection between silence and the potential for deeper understanding and peace. The "pun" suggests a play on Words or meanings, highlighting how silence can serve as a powerful tool for introspection and unity among people. By encouraging quiet, Neruda emphasizes the importance of reflection and the possibility of resolving conflicts without violence.