vigilante
noun
ˌvɪdʒɪəˈlænti
noun
1
someone
who
illegally
punishes
criminals
and
tries
to
prevent
crime,
usually
because
they
think
the
police
are
not
doing
this
effectively
民间护法者，义务警察〔指私自非法惩治罪犯、试图防止犯罪的人，常常是因为他们认为警方办事不力〕