(x I this paper we consider the initial boundary value problem for a nonlinear damping and a delay term of the form: |u_t|^lu_tt u, u_tt+_1|u_t|^m-2u_t\\+_2|u_t(t-)|^m-2u_t(t-)=b|u|^p-2u t), on with initial conditions and D boundary conditions. U appropriate conditions, . we prove that there are solutions with negative initial energy that blow up finite time if. Blow-up of Result in a Nonlinear Wave Equation with Delay and Source Term. DNC. 2026;10(4):733-741. doi:10.5890/DNC.2021.12.012