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crucial
adjective
extremely
important
because
it
decides
or
strongly
affects
the
result
of
something
•
Wearing
a
helmet
is
crucial
when
riding
a
bike
.
Wearing
a
helmet
is
crucial
when
riding
a
bike
.
•
Getting
enough
sleep
before
the
exam
is
crucial
.
Getting
enough
sleep
before
the
exam
is
crucial
.
First
used
in
18th-century
science
for
a
“
crucial
experiment
”
that
settled
between
competing
ideas
;
from
Latin
crux
“
cross
,”
suggesting
a
crossroad
where
one
path
must
be
chosen
.
