警官たちは群衆をおしとどめた。

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

group (of people); crowd; horde; throng; mob; multitude

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to push; to press; to apply pressure from above; to press down; to stamp (i.e. a passport); to apply a seal; to affix (e.g. gold leaf); to press (someone for something); to urge; to compel; to influence; to overwhelm; to overpower; to repress; to push (events along); to advance (a plan); to do in spite of ...; to do even though ...; to force; to make sure; to be pressed for time; to advance troops; to attack; (of light) to be diffused across an entire surface

to stop; to stay (e.g. the night); to cease; to put an end to; to contain; to keep (in position, in place); to limit; to record (e.g. a fact); to retain