To push through forcefully.
To destroy with a bulldozer.
To push into a heap, as a bulldozer does.
To shoot down an idea immediately and forcefully.
To push someone over by heading straight over them. Often used in conjunction with "over".
To constrain someone by force or by social, moral or legal means.
To be indebted to someone.
To do (someone) a service or favour (hence, originally, creating an obligation).