The affix ṭhak comes in the sense of 'completed thereby' after the words akṣadyūta etc. being in the Instrumental -3rd case in construction.,
Thus अक्षद्यूतेन निर्वृत्तम् = आक्षद्यूतिकं वैरम् 'enmity -- which was growing but has been completed by gambling'. So जानुप्रहृतिकम् ॥
1 अक्षद्यूत, 2 जानुप्रहृत (प्रहूत ), 3 जङ्घाप्रहृत (प्रहूत), 4 जङ्घाप्रहत 5 पादस्वेदन, 6 कण्टकमर्दन, 7 गतानुगत, 8 गतागत, 9 यातोपयात, 10 अनुगत ॥,