First-person singular (yo) future subjunctive form of equivocar.
Formal second-person singular (usted) future subjunctive form of equivocar.
Third-person singular (él, ella, also used with usted?) future subjunctive form of equivocar.
Etymology
From Late Latinaequivocāre, present infinitive form of aequivocō(“I call with the same name”)
Surface analysis: equivoco(“ambiguous”) +-are(1st conjugation verbal suffix).