durdharsatvasya mad-ripoh
bruhi-kindly inform us; karanam-the cause; etasya-of all this; durdharsatvasya-of the formidableness; mat-ripoh-of my enemy; ojah-prowess; sahah-energy; balam-strength; tejah-influence; yatah-wherefrom; etat-all this; samudyamah-endeavor.