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1161. The great mass of the words

 तु tu. The great mass of the words of this formation are the infinitives — accusatives in the later language, in the earlier likewise datives and ablative-genitives: see above, 970 b, 972, But a few are also used independently, as action-nouns or with concreted meaning; and an extremely small number, of somewhat questionable character, appear to have the value of agent-words. They are of all genders, but chiefly masculine. The root has the guṇa-strengthening.

a. The infinitive words are accented on the radical syllable when simple, and most of the others have the same accent; but a few have the tone on the ending.

b. Examples are: of the regular formation, masc. dā́tu sharejātubirthdhā́tu elementtántu threadmántu counselótu weftsātu receptaclesétu tiesótu pressure, alsokrátu capacity, and sáktugrits; fem. vástu morning; neut, vastu thingvā́stu abode; — with accent on the ending, aktú rayjantúbeinggātú way and songyātú (?) demon,hetú causeketú banner (all masc.); — with unstrengthened root, ṛtú seasonpitú drinksū́tu birth, and apparently kṛ́tu (in kṛ́tvas times): with vṛddhi-strerigthening, vā́stu(above). Agent-nouns appear to be dhā́tu drinkable and kroṣṭu jackal.

c. The infinitives in tu have (968) often the union-vowel i before the suffix, and this in a few cases is lengthened to ī. In other use occur also -stárītu and -dhárītu (both with dus), -hávītu (with su); turphárītu seems of the same formation, but is obscure.

d. In a few instances, the suffix tu appears to be added to a tense- or conjugation-stem in a; thus, edhatú and vahatútamyatú and tapyatú; and siṣāsátu. The accent of the last is paralleled only by that of jīvā́tu life, which is further exceptional in showing a long ā; it is used sometimes in the manner of an infinitive.