deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
/thAs "you' (bent)" is the singular ending in group /thAsAthAndhvam —
labh लभ् + /laG /thAs → !**alabhathAs अलभथास् "you' got"
In the /laT, /thAs turns into /se''' by thAsasse —
zeSe शेषे "you' sleep"
**nIyase नीयसे "you' are led"
In the /loT, /thAs turns into /sva''' by savAbhyAMvAm... q.v.