Definition: general rules or principles laid down regarding the use of words in language and literature such as (l) a word recognised as correct should always be used, cf. एवमिहापि समानायामर्थगतौ शब्देन चापशब्देन च धर्मनियमः क्रियते शब्देनैवार्थोभिधेयो नापशब्देनेति । एवंक्रियमाणमभ्युदयकारि भवति M. Bh. on P. I. I. Ahnika l, (2) never a base alone or an affix alone should be used, but always a base with the necessary affix should be used; cf. यावता समयः कृतो न केवला प्रकृतिः प्रयोक्तव्या न केवलः प्रत्ययः M. Bh, on P. I. 2.64 Vart. 8, also on P. III. 1.94 Vart. 3; (3) when the sense is already expressed by a word, a word repeating the sense should not be used; cf. उक्तार्थानामप्रयोगः. Besides these, many minor regulations of the type of Paribhasas are laid down by grammarians. For details see Paribhashasamgraha Introduction.