The affix ṭac comes after an avyayībhāva samāsa ending in am as the final of a compound.,
Thus उपराजम्, अध्यात्मम्, प्रत्यात्मम् ॥ The final अन् is elided by 6.4.144.,
Adhyāya 5 · Pāda 4 · Rule 108
The affix ṭac comes after an avyayībhāva samāsa ending in am as the final of a compound.,
Thus उपराजम्, अध्यात्मम्, प्रत्यात्मम् ॥ The final अन् is elided by 6.4.144.,