Verse 2

मात्रादिपादभेदेन प्रणवं संस्मरन्यतिः ।अध्यारोपापवादेन स्वरूपं शुद्धमव्ययम्

In plain words

the yati, recollecting the praṇava by distinguishing its mātrās, pādas and the rest, and -- by adhyāropa and apavāda -- the pure, imperishable svarūpa;