Based on the dynamical model having a large anomalous dimension γm≃2, we propose that the t quark condensate is responsible for the mass of W and Z bosons within the framework of the SU (3)C×SU(2)L×U(1)Y gauge theory (without Higgs) plus four-fermion interactions among quarks and leptons. This accounts for the largeness of the t quark mass mt without violating the weak-isospin relation [ ]. Quark/lepton mass matrices are obtained through the four-fermion interactions, which yields no serious flavor-changing neutral currents. The model predicts a [ ] composite scalar meson with a mass ≃2mt. A possibility for an unusual resolution of the strong CP problem is also suggested.