अचो यत्

The letter त् of this affix is indicatory showing that the udatta accent falls on the first vowel (VI. I. 213); thus गा + यत् = गेय, noun sing. गेयम् 'what is to be sung'; so also पेयम् 'what is to be drunk'; जेयम् 'what is to be conquered'. The आ of गा and पा is changed into ए by 6.4.65. Why do we say 'that ends in a vowel'? By sutra 124 of this chapter, a root ending in a consonant takes ण्यत् affix instead of यत्; reading these two aphorisms together, the conclusion to be drawn is that the affix यत् comes after roots which primarily end in a vowel, though in the course of development they may end in a consonant by the application of other rules. Thus from दो 'to cut', we have the desiderative root दित्स, which ends in a vowel अ. This अ is elided before ardhadhatuka affixes and thus the root becomes दित्स्, which ends in a consonant; nevertheless we shall have the affix यत् and not ण्यत्. Thus दित्स्यम् 'what is wished to be cut'; धित्स्यम् 'what is wished to be placed'. Similarly लु before ardhadhatuka affixes becomes लो, the ओ is changed into अव् before य (VI. I. 79) and the form then is लव्. The root लव् however takes यत् and not ण्यत्; as लव्यो, पव्यम्, &c.

Vart:- The verbs तक् 'to fly', शच् 'to leap', चत् 'to ask', यत् 'to attempt' and जन् 'to be born', should be enumerated in addition; that is to say, these verbs, though ending in a consonant, take यत् and not ण्यत्; as तक्यम्, शस्यम्, चत्यम्, यत्यम्, and जन्यम्.

Vart:-Ånd of the verb हन् 'to kill' वध is the substitute when it optionally takes the affix यत्. Thus we have वध्यम् or घात्यम्. The latter form is evolved by sutras (VII. 3. 32 and 54). The affix यत् comes only after the वध् substitute; after हन् the affix ण्यत् comes which changes the ह into घ, and न into त and causes vriddhi.,