Formation of passive voice in Sanskrit

[T.K Gopalan]

Grammar books spell out the following rules to make passive voice from verb roots.

I shall take the example of √ इ।

Rule 1. Add य at the end : इ य।

Rule 2. lengthen the final ई of the root: इ becomes ई।

Rule 3 affix atmanepada affixes.

For 3rd pers. imperfect these affixes are अ prefix and त suffix: अ ई य त।

अ ई य त = ऐयत।This is the correct form for √ इ।

Now let us consider this √ इ with an उपसर्ग ‘प्रति’: प्रति √ इ।

The passive imperfect third person is not प्रति + ऐयत।

It is प्रातीयत।

I request any of my learned friends how one gets the form प्रातीयत।

Many thanks.