/vizvapA- / विश्वपाॱ

The base

!**vizvapA- विश्वपाॱ

is a mfn descriptive that means "ruler of everything", "lord of the universe".

The pA- पाॱ part is a rootnoun made from the root pA पा "to protect, to rule" (if you make it from the root pA पा maning to drink, the meaning becomes "all-drinker").

When it is m it can describe either the Sun or any male deity you happen to be flattering at the moment.

This word is found often in grammars because it is an example of masculine nounbase ending in A आ. A very rare group.

Notice that as this does not end in feminine /Ap, rule halGyAbbhyodIrgh... does not apply —

**vizvapA- विश्वपाॱ + /su → !**vizvapAs विश्वपास्, by no rules

Before /jas, prathamayoHp... applies normally —

**vizvapA- विश्वपाॱ + /jas → **vizvapAs विश्वपास्, by prathamayoHp...

However, as prathamayoHp... does not lengthen a अ into A आ, but just keeps a long A आ in place, rule tasmAcchason... does NOT trigger —

**vizvapA- विश्वपाॱ + /zas → **vizvapAs विश्वपास्, by prathamayoHp...