tribulation
noun
ˌtrɪbjʊəˈleɪʃən
noun
1
serious
trouble
or
a
serious
problem
[正式] 苦难，艰辛
Even
close
friends
were
unaware
of
the
tribulations
she
faced.
即使是亲近的朋友也不了解她所面对的种种艰辛。