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mistake
noun
something
you
do
,
say
,
or
think
that
is
not
correct
and
often
causes
a
problem
or
an
unwanted
result
β’
I
made
a
silly
mistake
on
my
math
test
and
lost
two
points
.
I
made
a
silly
mistake
on
my
math
test
and
lost
two
points
.
β’
Forgetting
your
keys
is
a
common
mistake
.
Forgetting
your
keys
is
a
common
mistake
.
From
Old
Norse
β
mistaka
β
meaning
β
to
take
in
error
β (
mis-
β
wrongly
β
+
taka
β
take
β).
The
noun
sense
arose
in
late
Middle
English
.
verb
-
mistake
,
mistaking
,
mistakes
,
mistook
,
mistaken
to
think
wrongly
that
someone
or
something
is
another
person
or
thing
β’
Many
people
mistake
me
for
my
older
brother
.
Many
people
mistake
me
for
my
older
brother
.
β’
He
mistook
the
salt
for
sugar
and
ruined
the
soup
.
He
mistook
the
salt
for
sugar
and
ruined
the
soup
.
From
Old
Norse
β
mistaka
β
meaning
β
take
wrongly
β.
The
verb
entered
Middle
English
in
the
14th
century
.
verb
-
mistake
,
mistaking
,
mistakes
,
mistook
,
mistaken
to
understand
something
wrongly
or
give
it
the
wrong
meaning
β’
Please
don
β
t
mistake
my
silence
as
disapproval
.
Please
don
β
t
mistake
my
silence
as
disapproval
.
β’
She
mistook
the
directions
and
ended
up
at
the
wrong
address
.
She
mistook
the
directions
and
ended
up
at
the
wrong
address
.
Same
Old
Norse
root
as
other
senses
,
with
meaning
extended
to
wrong
understanding
by
the
17th
century
.
economist
noun
a
person
who
studies
or
is
an
expert
in
economics
,
especially
how
money
,
markets
,
and
trade
work
β’
The
economist
explained
how
rising
interest
rates
could
slow
inflation
.
The
economist
explained
how
rising
interest
rates
could
slow
inflation
.
β’
As
an
economist
,
she
spends
her
days
analyzing
data
about
consumer
spending
.
As
an
economist
,
she
spends
her
days
analyzing
data
about
consumer
spending
.
Mid-16th
century
,
from
French
Γ©conomiste
,
from
Γ©conomie
β
economy
β,
ultimately
from
Greek
oikonomΓa
β
household
management
β.
chemistry
noun
-
chemistry
the
branch
of
science
that
studies
what
substances
are
made
of
,
how
they
behave
,
and
how
they
can
change
into
other
substances
β’
In
chemistry
class
,
the
students
watched
copper
turn
green
when
it
was
heated
.
In
chemistry
class
,
the
students
watched
copper
turn
green
when
it
was
heated
.
β’
Marie
Curie
made
groundbreaking
discoveries
in
chemistry
that
changed
the
world
.
Marie
Curie
made
groundbreaking
discoveries
in
chemistry
that
changed
the
world
.
From
Late
Middle
English
chymistry
,
from
earlier
alchemy
,
ultimately
tracing
back
to
Greek
khΔmia
β
art
of
transmuting
metals
β.
noun
-
chemistry
a
strong
and
natural
feeling
of
connection
or
attraction
between
people
that
makes
them
get
along
well
together
β’
Everyone
in
the
audience
could
feel
the
chemistry
between
the
two
lead
actors
.
Everyone
in
the
audience
could
feel
the
chemistry
between
the
two
lead
actors
.
β’
The
coach
said
the
team
β
s
success
was
due
to
the
great
chemistry
in
the
locker
room
.
The
coach
said
the
team
β
s
success
was
due
to
the
great
chemistry
in
the
locker
room
.
Metaphorical
extension
of
scientific
β
chemistry
β
to
human
relationships
,
first
recorded
in
the
19th
century
.
optimistic
adjective
feeling
or
showing
confidence
that
good
things
will
happen
or
that
a
situation
will
turn
out
well
β’
Even
after
losing
the
first
game
,
the
coach
stayed
optimistic
about
the
team's
chances
.
Even
after
losing
the
first
game
,
the
coach
stayed
optimistic
about
the
team's
chances
.
β’
Maria
felt
optimistic
on
the
morning
of
her
job
interview
.
Maria
felt
optimistic
on
the
morning
of
her
job
interview
.
From
French
optimiste
,
from
Latin
optimus
β
best
β
+β
βistic
,
originally
describing
a
philosophical
doctrine
that
this
is
the
best
of
all
possible
worlds
;
later
extended
to
general
hopefulness
.
adjective
(
of
statements
,
forecasts
,
or
numbers
)
based
on
an
expectation
that
results
will
be
better
than
average
or
most
likely
β’
The
company's
optimistic
sales
forecast
impressed
the
investors
.
The
company's
optimistic
sales
forecast
impressed
the
investors
.
β’
Her
time
estimate
was
too
optimistic
,
and
the
project
ran
late
.
Her
time
estimate
was
too
optimistic
,
and
the
project
ran
late
.
Same
origin
as
the
primary
sense
;
the
meaning
extended
in
the
late
19th
century
to
describe
forecasts
or
estimates
judged
hopeful
.