Abstract We consider the positivity bounds for WIMP scalar dark matter with effective Higgs-portal couplings up to dimension-8 operators. Taking the superposed states for Standard Model Higgs and scalar dark matter. we show that the part of the parameter space for the effective couplings. otherwise unconstrained by phenomenological bounds. https://www.hindigyanvishv.com/limited-stock-No-Face-No-Case-Logo-T-Shirt-special-save/