slamati

1. (literal sense) to break
   Vetar je celu noć slamao grane. — The wind was breaking branches all night.
2. (of resistance, will) to break down; to crush
   Policija je satima slamala otpor demonstranata. — The police spent hours breaking down the protesters' resistance.
   Bolest ga polako slama. — The illness is slowly breaking him.
3. (slamati se; of waves) to break
   Talasi se slamaju o stene. — The waves break against the rocks.

In the literal sense lomiti is more usual; slamati is typical of figurative uses.