deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
The verb classes
/bhvAdi /adAdi /juhotyAdi /divAdi /svAdi
/tudAdi /rudhAdi /tanAdi /kryAdi /curAdi
are called verb class
1 2 3 4 5
6 7 8 9 10
according to the Westerners.
This thing is not a sUtra, I just made it up. But you might want to memorise it in order to remember the names and numbers of the ten verb classes. These numbers come in handy when you have to use a Western dictionary or grammar, including inria (see example below).