Even if the opinions of others can be suppressed, I cannot imagine to what results my speech may lead.

The students held the male student down and cut his hair with a pair of scissors.

The purse snatcher was frantically struggling to get away from me while I had him pinned down.

The section chief keeps him down.

Sometimes, one of the politicians can be seen trying to keep the audience's opinions under control during televised debates.

When the dog tried to bite me, I held him down by the neck and thoroughly scolded him.