/Gasi / ङसि

"Gasi" is the singular /sup ending in the fifth group /GasibhyAmbhyas. It means "from".

**manas- मनस् + /Gasi → !**manasas मनसस् "from the mind"

**suhRd- सुहृद् + /Gasi → **suhRdas' सुहृदस्ऽ "from a friend"

/Gasi gives exactly the same result as /Gas after all nounbases excepting only a अ-enders (like **azva- अश्वॱ), including includes a अ-ender pronouns (like /tad- when it loses its d द्) —

**azva- अश्वॱ m + /Gasi → **azvAt अश्वात् by TAGasiGas...

**ta- तॱ mn + /Gasi → **tasmAt तस्मात् by TAGasiGas...

**azva- अश्वॱ m + /Gasi → **azvasya अश्वस्य by TAGasiGas...

**ta- तॱ mn + /Gas → **tasya तस्य by TAGasiGas...

This "Gasi" is a /Git, what for?

The G ङ् label makes /Gasi and /Gas take the form As आस् after some feminines, by rule ANnadyAH —

**kukkuTI- कुक्कुटीॱ + /Gas → !**kukkuTyAs कुक्कुट्यास् "of a hen"

**azvA- अश्वाॱ + /Gas → **azvAyAs अश्वायास् "of a mare"

Why is "Gasi" an /idit?

Just so that it turns into At आत् after a अ bases by TAGasiGas..., and into smAt स्मात् after pronouns by !! —

azva + /Gasi → **azvAt अश्वात्

**ta- तॱ + /Gasi → **tasmAt तस्मात्

azva + /Gas → **azvasya अश्वस्य

**ta- तॱ + /Gas → **tasya तस्य

After all other bases, fifth /Gasi always sounds like sixth /Gas —

**guru- गुरुॱ + /Gasi → **guros गुरोस् "from teacher"

**pitR- पितृॱ + /Gasi → **pitur पितुर् "from father"

**guru- गुरुॱ + /Gas → **guros गुरोस् "of teacher"

**pitR- पितृॱ + /Gasi → **pitur पितुर् "of father"