depending as they do upon the desire of the speaker. Some tat- purusa compounds such as the प्रादितत्पुरुष or उपपदतत्पुरुष are called नित्य and hence their constitutent words, with the case affixes appli- ed to them, are not noticed sepa- rately; cf. P.II.2.18,19, In some cases अ as a compound-ending ( समासान्त ) is added: e.g. राजघुरा, नान्दीपुरम् ; cf. P. V.4.74; in some cases अच् ( अ ) is added: cf. P.V-4 75 o 87: while in some other cases टच् ( अ ) is added, the mute letter ट् signifying the addition of ङीप् ( ई) in the feminine gender; cf.P.V.4. 91-1 12. For details See p.p. 270-273 Mahabhasya Vol.VII published by the D. E. Society, Poona.
तदन्तविधि a peculiar feature in the interpretation of the rules of Panini, laid down by the author of the Sutras himself by virtue of which an adjectival word, quali- fying its principal word, does not denote itself, but something end- ing with it also; cf. येन विधिस्तदन्तस्य P.I.1.72.This feature is principally noticed in the case of general words or adhikaras which are put in a particular rule, but which Occur in a large number of subsequent rules; for instance, the word प्राति- पदिकात्, put in P.IV.1.1, is valid in every rule upto the end of chapter V and the words अतः, उतः, यञः etc. mean अदन्ताद् , उदन्तात् , यञन्तात् etc. Similarly the words धातोः (P.III.1.91) and अङ्गस्य (P.VI. 4.1 ) occurring in a number of subsequent rules have the adjecti- val words to them, which are mentioned in subsequent rules, denoting not only those words,but words ending with them. In a large number of cases this feature
of तदन्तविधि is not desirable, as it, goes against arriving at the desired forms, and exceptions deduced from Panini's rules are laid down by the Varttikakara and later gram- marians; cf. Par. Sek. Pari. 16,23, 31 : also Mahabhasya on P.I.1.72.
तदादिविधि a convention similar to the तदन्तविधि of Panini,laid down by the Varttikakara laying down that in case an operation is prescribed for something followed by a single letter, that single letter should be taken to mean a word beginning with that single letter: cf. यस्मिन्विधि- स्तदादावल्ग्रहणे P.I.1.72 Vart. 29: Par. Sek. Pari. 33.
तद्गुणसंविज्ञान lit. connection with what is denoted by the constituent members; the word refers to a kind of Bahuvrihi compound where the object denoted by the compound includes also what is denoted by the constituent members of the compound; e g. the compound word सर्वादि in the rule सर्वादीनि सर्वनामानि includes the word सर्व among the words विश्व, उभय and others, which alone form the अन्यपदार्थ or the external thing and not merely the external object as mentioned in Panini's rule अनेकमन्य- मपदार्थे (P.II. 2. 24): cf. भवति बहुर्वीहौ तद्गुणसंविज्ञानमपि । तद्यथा । चित्रवाससमानय। लोहितोष्णीषा ऋत्विजः प्रचरन्ति । तद्गुण आनीयते तद्गुणाश्च प्रचरन्ति M.Bh. on I.1.27. For details cf. Mahabhasya on P.1.1.27 as also Par. Sek. Pari. 77.
तद्गुणीभूत lit. made subordinated to (the principal factor); completely included so as to form a portion The word is used in connection with augments which, when added to.a word are completely included in that word, and, in fact, form a part of the word: cf यदागमास्तद्भुणी-