pa-, -um-
To cut into s.t. (as a saw); sink into s.t. (as tires); consume s.t. (as fire).
The weeds I cut are not consumed (lit. fire does not eat) because they are still wet.
The saw cuts into the wood.
The jeep got stuck because its tires sank into the mud.
His sickness has become very bad (lit. happened to eat) because he was not immediately brought to the doctor.