B.G 2.17
avināśi tu tadviddhi yēna sarvamidaṁ tatam । vināśamavyayasyāsya na kaścitkartumarhati ॥ 2-17॥
Indestructible is THAT, pierced by which all this exists. No one is capable of causing the destruction of THAT imperishable.
Gīta Bhāshya 2.17
The destruction of the Lord through instrumentality is denied by using the word 'avinashina'. His imperishable nature is indicated by the word 'avyaya'.
kiṁ bahunā । yad dēśatōnantaṁ tannityamēva vēdādyanyadapītyāha - avināśīti । nāpi śāpādinā vināśa ityāha–vināśamiti । avyayaṁ ca tat ॥ 17 ॥
What are those others (without destruction)? Those that are not bound by space, that are everlasting like Vedas, are indicated by the word 'avinashina'. Their destruction through instrumentality is denied by using the word 'vinasham', i.e. destruction. The word 'avyaya', i.e. imperishable, is used to address such principles.