choke

choke 1 

•  verb

1    [I,T] to prevent someone from breathing or be prevented from breathing, because the throat is blocked or because there is not enough air:
?The fumes were choking me.
?choke on: Leila nearly choked on a fish bone.
2    [T] to fill a road, pipe etc completely and block it:
?be choked with: The roads were choked with traffic.

choke up phrasal verb [I]
be choked up to feel such strong emotions about something that you are almost crying:
?Bill wanted to thank him, but he was too choked up to speak.

choke sth <-> back phrasal verb [T]
to control yourself so that you do not show how angry, sad etc you are:
?Anna choked back the tears as she tried to speak.