Translation of "to and fro" - English-Spanish dictionary

to and fro

adverb, adjective uk /ˌtuː ən ˈfrəʊ/ us /ˌtuː ən ˈfroʊ/

in one direction and then in the opposite direction, a number of times

de un lado a otro
She was gazing out the window, rocking rhythmically to and fro.

(Translation of “to and fro” from the Cambridge English-Spanish Dictionary © Cambridge University Press)