नदीदुर्गं तु द्विगुणक्लेशकरमुदकं च पातव्यं वृत्तिकरं चामित्रस्य ॥ कZ_०७.१०.३० ॥
nadīdurgaṃ tu dviguṇakleśakaram udakaṃ ca pātavyaṃ vṛttikaraṃ cāmitrasya
Un fuerte fluvial, en cambio, causa una dificultad doble: hay que lidiar con (y depender del) agua, y esa misma agua sostiene el sustento y la resistencia del enemigo.
Because the attacker’s operations become water-constrained while the defender gains reliable sustainment from the same water source.