The Compendium of Caraka 3.8.54_3

3.8.54_3

athānarthakam---anarhtakaṃ nāma yadvacanamakṣaragrāmamātrameva syāt pañcavargavanna cārthato gṛhyate/

Now, the meaningless: the meaningless is a statement that consists merely of a group of letters, like the five consonant groups, and is not apprehended in terms of meaning.