pobijati

1. (of a claim, argument) to refute; to disprove
   Advokat pobija sve optužbe protiv svog klijenta. — The lawyer is refuting all the charges against his client.
   Naučnici već godinama pobijaju taj mit. — Scientists have been disproving that myth for years.
2. (of many) to kill; to slaughter
   Vojnici su pobijali civile po okolnim selima. — The soldiers were killing civilians in the surrounding villages.
3. (of stakes, posts) to drive in; to hammer in
   Radnici pobijaju stubove za novu ogradu. — The workers are driving in posts for the new fence.

The perfective is pobiti, which is more common in the sense of killing many. The reflexive meaning 'to come to blows' (pobiti se: pobili su se) is used practically only in the perfective; the imperfective equivalent is tući se.