Two possible explanations of the existence and the properties of the $\rho$ meson are analyzed within the framework of the nonpolynomial Lagrangian. It is found that the $\rho$ meson boot-strapping reciprocally with the $B$ meson in the static $\pi \omega$ scattering provides a qualitatively satisfactory description of the $\rho$-meson properties. On the other hand, the forces in the $\pi \pi$ scattering are far too weak to generate the $\rho$ meson. The calculations are performed within the framework of the $\frac{N}{D}$ method, and are free of a cutoff parameter.

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