तुर् इष्ठ-इम-ईयस्सु

Thus करिष्ठः, विजयिष्ठः, वहिष्ठः, दोहीयसी धेनुः ॥ The whole affix तृ is elided; otherwise only the last vowel (टि) with the following consonant would have been elided by the following rules. The anuvritti of लुक् of the last aphorism should not be read into this, for had the elision taken place by लुक्, then the mark of the affix would also have disappeared likewise (I. 1. 63.), and there would have remained no guna in विजयिष्ठ and करिष्ठ ॥ See (V. I. 122), and 5.3.59; for these affixes. The affix इमन् has been read into this aphorism for the sake of the subsequent sutra, there being no example of तृ followed by इमन्; तृ is followed by इष्ठ and ईयस् by 5.3.59.,