to and fro

• Expresión adverbial que indica movimiento repetido en direcciones opuestas, de un lado a otro de manera continua, o alternando entre dos lugares o estados.

An adverbial phrase meaning moving backwards and forwards, or from one place to another repeatedly.

1. Back and forth movementB1formal

   Moving repeatedly in one direction and then the opposite direction.

   vaivén

   • The pendulum swung to and fro.
   • He paced to and fro in the waiting room.
   • The boat rocked to and fro on the waves.

2. Alternating actions or ideasB2formal

   Used to describe a situation where people or things move or change between two states or positions.

   de un lado a otro

   • The debate went to and fro without a clear winner.
   • They exchanged emails to and fro for weeks.
   • The negotiations moved to and fro before reaching an agreement.