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tank
noun
a
large
strong
container
for
holding
liquid
or
gas
•
The
restaurant
keeps
fresh
lobsters
in
a
huge
tank
filled
with
seawater
.
The
restaurant
keeps
fresh
lobsters
in
a
huge
tank
filled
with
seawater
.
•
Dad
checked
the
fuel
tank
before
we
set
off
on
the
long
drive
.
Dad
checked
the
fuel
tank
before
we
set
off
on
the
long
drive
.
From
Portuguese
"
tanque
"
meaning
"
pond
"
or
"
reservoir
",
adopted
into
English
in
the
17th
century
for
large
liquid
containers
.
noun
a
very
heavy
armoured
military
vehicle
that
moves
on
tracks
and
carries
large
guns
•
A
row
of
tanks
rumbled
down
the
street
during
the
parade
.
A
row
of
tanks
rumbled
down
the
street
during
the
parade
.
•
The
museum
lets
visitors
climb
inside
a
restored
World
War
II
tank
.
The
museum
lets
visitors
climb
inside
a
restored
World
War
II
tank
.
Adopted
during
World
War
I
as
a
code
name
for
the
new
armoured
vehicles
,
originally
to
disguise
them
as
"
water
tanks
"
during
secret
production
.
verb
to
fail
or
fall
in
value
very
suddenly
•
The
company's
shares
tanked
after
the
disappointing
earnings
report
.
The
company's
shares
tanked
after
the
disappointing
earnings
report
.
•
His
energy
tanks
whenever
he
skips
breakfast
.
His
energy
tanks
whenever
he
skips
breakfast
.
Originated
in
U
.
S
.
slang
in
the
1980s
,
probably
from
the
idea
of
sinking
to
the
bottom
like
a
heavy
tank
.
noun
(
informal
)
a
person
who
is
extremely
strong
and
tough
•
On
the
football
field
,
Marcus
is
a
tank
who
knocks
over
anyone
in
his
path
.
On
the
football
field
,
Marcus
is
a
tank
who
knocks
over
anyone
in
his
path
.
•
She
might
be
short
,
but
in
the
gym
she's
a
real
tank
when
it
comes
to
lifting
weights
.
She
might
be
short
,
but
in
the
gym
she's
a
real
tank
when
it
comes
to
lifting
weights
.
Metaphoric
extension
from
the
armoured
military
vehicle
sense
,
first
recorded
in
sports
slang
in
the
late
20th
century
.
verb
to
deliberately
lose
a
game
,
match
,
or
test
on
purpose
•
Some
fans
accused
the
team
of
tanking
the
last
few
matches
to
get
a
better
draft
pick
.
Some
fans
accused
the
team
of
tanking
the
last
few
matches
to
get
a
better
draft
pick
.
•
He
tanked
the
exam
because
he
wanted
to
retake
the
course
with
his
friends
.
He
tanked
the
exam
because
he
wanted
to
retake
the
course
with
his
friends
.
Emerging
from
U
.
S
.
sports
slang
in
the
1970s
,
possibly
influenced
by
earlier
sense
of
'sink'
or
'bottom
out'
.