अयादि-सन्धि - 2

In the following cases, अयादि-सन्धि takes place:

1. ओ or औ when followed by a termination or affix beginning with य् change to अव् or आव् respectively. E.g. Forming word by adding तद्धित affix: गो + यम् = गव्यम्। नौ + यम् = नाव्यम्।This is applicable for roots only when the ओ or औ of the root occurs by change of the ending vowel of the root to गुण or वृद्धि due to the termination that follows. E.g. लू+यम्=लो+यम् = लव्यम्। अवश्यलु+यम्=अवश्यलौ+यम् = अवश्यलाव्यम्। 
2. The ओ of गो is changed to अव् when followed by यूति when it means a particular measure of length. E.g. गव्यूतिः । It is compulsorily changed to अव when followed by इन्द्र or अक्ष - गवेन्द्रः। गवाक्षः। If it is followed by a vowel, it is optionally changed to अव. E.g.गो+अग्रम्=गवाग्रम्, गोऽग्रम् , also गोअग्रम् । गो+उष्ट्रम्=गवोष्ट्रम् or गवुष्ट्रम् ।   
3. The ए of potential participle of roots जि (1 प.) and क्षि (1,5,6 प.) changes to अय् before य when meaning "capable or definitely possible". If it is not definitely possible, the ए remains as it is. E.g. मनः जेयम् (should be conquered but not always possible ); जय्यम् - What can be conquered. पापं क्षेयम् (should be reduced but not always possible) क्षय्यम् - What can be reduced.