The affix ṭhak comes after a word in the Instrumental -3rd case in construction when the sense is 'mixed therewith'.,
The word तेन is understood here. The word संसृष्ट means unification, mixing &c. Thus दध्ना संसृष्ट = दाधिकम् 'smeared with curds' मारिचिकम्, शार्ङ्गवेरिकम् पैप्पलिकम् ॥ The word 'sanskrtam' 4.4.3 and 'sansrshtam' should be distinguished. The former refers to a case where by the combination of two things, a something better is produced; no such idea of bettering is to be found in संसृष्ट ॥,