equivocar
/ekiboˈkaɾ/ · A2 · verb
to make a mistake
equi-vocar = equal + voice: two things called the same, so you mix them up
From Latin aequivocare: aequus (equal) + vocare (to call). Giving two different things the same name leads to confusing them. English equivocal and equivocate share the root. Usually reflexive: equivocarse = to be wrong.