gag

Prevent from speaking out.

“The press was gagged”

Make an unsuccessful effort to vomit; strain to vomit.

Tie a gag around someone's mouth in order to silence them.

“The burglars gagged the home owner and tied him to a chair”

Make jokes or quips.

“The students were gagging during dinner”

Struggle for breath; have insufficient oxygen intake.

“he swallowed a fishbone and gagged”

Be too tight; rub or press.

Cause to retch or choke.

Restraint put into a person's mouth to prevent speaking or shouting.

A humorous anecdote or remark intended to provoke laughter.

“he knows a million gags”