was mistaken; made a mistake
Johnston se equivocó, pero no era un mentiroso.
Johnston was wrong, but he wasn't a liar.
— El último emperador (1987)
No, el que se equivocó fui yo.
No, I was the one who made the mistake.
— Perfectos desconocidos (2016)
Tom se equivocó al rechazar la ayuda de Mary.
Tom made a mistake by turning down Mary's help.
Me temo que se equivocó de número.
I'm afraid you dialed the wrong number.
Me parece que Tom bebió de mi vaso porque se equivocó.
I think Tom drank from my glass because he made a mistake.