Sanskrit grammarians when giving the rules according to which nouns and adjectives are derived from verbal roots by means of primary suffixes (Kṛt), mention among the rest the suffixes +tum+ (Pâṇ., III. 3, 10), +se+, +ase+, +adhyai+, +tavai+, +tave+, +shyai+, e, +am+, +tos+, +as+ (IV. 4, 9-17), defining their meaning in general by that of +tum+ (III. 3, 10). This +tum+ is said to express immediate futurity in a verb, if governed by another word conveying an intention. An example will make this clearer. In order to say he goes to cook, where “he goes” expresses an intention, and “to cook” is the object of that intention which is to follow immediately, we place the suffix +tum+ at the end of the verb +pak+, to cook, and say in Sanskrit, vrajati pak-tum. We might also say pâcako vrajati, he goes as one who means to cook, or vrajati pâkâya, he goes to the act of cooking, placing the abstract noun in the dative; and all these constructions are mentioned together by Sanskrit grammarians. The same takes place after verbs which express a wish (III. 3, 158); _e.g._, icchati paktum, he wishes to cook, and after such words as +kâla+, time, +samaya+, opportunity, +velâ+, right moment (III. 3, 167); _e.g._, kâlaḥ paktum, it is time to cook, etc. Other verbs which govern forms in +tum+ are (III. 4, 65) +śak+, to be able; +dhṛsh+, to dare; +jñâ+, to know; +glai+, to be weary; +ghaṭ+, to endeavor; +ârabh+, to begin; +labh+, to get; +prakram+, to begin; +utsah+, to endure; +arh+, to deserve; and words like +asti+, there is; _e.g._, asti bhoktum, it is (possible) to eat; not, it is (necessary) to eat. The forms in +tum+ are also enjoined (III. 4, 66) after words like +alam+, expressing fitness, _e.g._, paryâpto bhoktum, alam bhoktum, kuśalo bhoktum, fit or able to eat. Here we have everything that is given by Sanskrit grammarians in place of what we should call the Chapter on the Infinitive in Greek and Latin. The only thing that has to be added is the provision, understood in Pâṇini’s grammar, that such suffixes as +tum+, etc., are indeclinable.