lessen
verb
ˈlesən
verb
1
to
become
smaller
in
size,
importance,
or
value,
or
make
something
do
this
（使）降低，（使）减少;
lessen
the
risk/chance/possibility
etc
(of
sth)
Exercise
lessens
the
risk
of
heart
disease.
运动可降低患心脏疾病的可能性。
lessen
the
impact/effect/importance
(of
sth)
The
new
project
will
lessen
the
effects
of
car
pollution.
这个新项目将减少汽车污染的影响。
Gradually
her
anxiety
lessened.
她的焦虑慢慢地减轻了。