avidyamānaḥ sambandho yasyāsāvasambandhaḥ, tattvānnaṣṭatvāc ca pūrvastāvat saṅketakālabhāvī śabdo 'narthakaḥ
The word that existed at the time of convention would be meaningless, both because it would lack connection [with meaning] and because it would have perished.