deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
The third ending is any of /TA /bhyAm /bhis (the third group in list svaujasamauTch...).
It can mean 'with' in the instrumental sense:
zastreNa praharati शस्त्रेण प्रहरति, 'throws with a weapon'
or in the comitative sense:
putreNa gacchati पुत्रेण गच्छति, 'goes with his / her son'
kAphI kSIreNa काफी क्षीरेण "coffee with milk"
and it means 'by' in passive constructions:
mayA dRSTaH मया दृष्टः, 'was seen by me'
mayA dRzyate मया दृश्यते 'is seen by me'
hato mayA zareNa हतो मया शरेण 'he was killed by me with an arrow'