anuvṛtti: continued rule application

This term refers to the continued relevance of (words from) an earlier rule to subsequent rules. The omission of these words from the sūtra achieves economy of expression, at the expense of needing to know how far the anuvṛtti applies.

There are several types of anuvṛtti.

The text of the Aṣṭādhyāyī is typically presented together with the anuvṛtti.

E.g. sūtra in bold and anuvṛtti following

1.3.4 न विभतक्तौ तुँस्माः। ~ उपदेशे इत् (1.3.2) हल् अन्त्यम् (1.3.3)

Bloomfield's comment on the anuvṛtti

A third method of abbreviation is less happy. Although the basic arrangement of Pinini's treatise was relevant to the subject-matter, he subordinated this logical order to a requirement of conciseness: every rule is so placed that as many as possible of its words can be replaced by ditto marks because they repeat words of the preceding rule. For this purpose so many rules are torn from their natural place that the basic structure of the grammar is to a large extent obscured. Worst of all, the ditto marks (anuvṛtti) and their cessation (nivṛtti) at the end of a series of rules are not actually written in the treatise as we have it.

— Bloomfield 1929, p. 271