After a verb that ends in a śala consonant and has an ik vowel for its penultimate letter and does not take iṭ -- ekāca upadeśe'nudāttāt [[7.2.10]], ksa is the substitute of cli,
The forms of the terminations of the Aorist with क्स are as follow:
Parasmaipada.
- 1st person, सं, साव, साम्
- 2nd person, सः, सत, सत
- 3rd person, सत्, सतां, सत्
Almanepada.
- सि, सीवहि, सीमहि
- सथाः, थाः, साथाम्, सध्वम्, ध्वम्
- सत, त, सातां, सन्त
As, मृश and कृष् in the last sutra have their Aorist with क्स as अमृक्सत् and अकृषत्; so दुह 'to milk' forms अधुक्षत् 'he milked', लिड् 'to lick' अलिक्षत्.
Why do we say 'when ending in श, ष, and ह'? Observe अभैत्सीत्, अच्छैत्सीत्; here सिच् is employed. Why do we say 'having for its penultimate इ, उ, ऋ or लृ'? Observe अधाक्षीत्. Why do we say 'not having an intermediate इ'? Observe अकोषीत् an अमोषीत्. See 7.2.4 and 8.2.28.,