शङ्खनादेन यन्त्राणि हृदयानि मनस्विनाम् । प्राकारं गदया गुर्व्या निर्बिभेद गदाधर: ॥ ५ ॥
śaṅkha-nādena yantrāṇi hṛdayāni manasvinām prākāraṁ gadayā gurvyā nirbibheda gadādharaḥ
With the blast of His conchshell, Lord Gadādhara shattered the fortress’s magical seals and shook the hearts of its valiant defenders. Then, with His heavy club, He demolished the surrounding ramparts and walls.
This verse describes Kṛṣṇa’s conch-blast shaking the defenders and His heavy club smashing the fortress wall, showing His irresistible divine strength in protecting the oppressed.
He is called Gadādhara because He bears and wields the gadā (club), here used to break open the enemy’s rampart during the battle.
It reminds a devotee that inner “fortresses” of fear and pride can be broken by taking shelter of Kṛṣṇa—hearing His glories and relying on His strength rather than one’s own ego.