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teen
noun
a
boy
or
girl
who
is
between
thirteen
and
nineteen
years
old
β’
The
movie
is
popular
with
teens
across
the
country
.
The
movie
is
popular
with
teens
across
the
country
.
β’
As
a
teen
,
she
started
a
small
online
business
.
As
a
teen
,
she
started
a
small
online
business
.
Shortened
form
of
β
teenager
,β
first
recorded
in
the
mid-20th
century
.
noun
numbers
or
ages
from
thirteen
through
nineteen
β’
She
learned
to
play
guitar
in
her
teens
.
She
learned
to
play
guitar
in
her
teens
.
β’
The
temperature
stayed
in
the
teens
all
morning
.
The
temperature
stayed
in
the
teens
all
morning
.
Derived
from
the
suffix
β
-teen
β
found
in
the
numerals
thirteen
through
nineteen
.
teenager
noun
a
young
person
who
is
between
thirteen
and
nineteen
years
old
β’
The
shy
teenager
spent
the
afternoon
practicing
guitar
in
his
bedroom
.
The
shy
teenager
spent
the
afternoon
practicing
guitar
in
his
bedroom
.
β’
A
group
of
teenagers
laughed
as
they
shared
fries
at
the
local
diner
after
school
.
A
group
of
teenagers
laughed
as
they
shared
fries
at
the
local
diner
after
school
.
From
teen
+β
-ager
,
first
recorded
in
the
1920s
as
a
colloquial
term
for
adolescents
.
committee
noun
a
group
of
people
chosen
to
study
,
plan
,
or
manage
something
on
behalf
of
a
larger
organization
β’
The
city
council
formed
a
committee
to
improve
the
public
parks
.
The
city
council
formed
a
committee
to
improve
the
public
parks
.
β’
Sarah
chairs
the
fundraising
committee
at
her
children
β
s
school
.
Sarah
chairs
the
fundraising
committee
at
her
children
β
s
school
.
Early
17th
century
:
from
the
verb
commit
+
βee
,
originally
indicating
people
to
whom
authority
is
β
committed
β.
noun
(
archaic
,
law
)
a
person
appointed
by
a
court
to
take
charge
of
someone
who
is
unable
to
manage
their
own
affairs
β’
In
1850
,
the
judge
named
Mr
.
Brown
as
committee
for
the
injured
sailor
.
In
1850
,
the
judge
named
Mr
.
Brown
as
committee
for
the
injured
sailor
.
β’
The
orphan
β
s
estate
was
managed
by
a
legal
committee
until
she
turned
twenty-one
.
The
orphan
β
s
estate
was
managed
by
a
legal
committee
until
she
turned
twenty-one
.
Same
origin
as
modern
sense
;
meaning
of
β
person
entrusted
β
arose
from
the
notion
of
being
β
committed
β
with
responsibility
.
tooth
noun
-
tooth
,
teeth
a
hard
white
part
in
the
mouth
that
bites
and
chews
food
β’
The
little
girl
lost
her
first
tooth
yesterday
.
The
little
girl
lost
her
first
tooth
yesterday
.
β’
Brushing
each
tooth
keeps
your
smile
healthy
.
Brushing
each
tooth
keeps
your
smile
healthy
.
noun
-
tooth
,
teeth
one
of
the
small
sharp
parts
that
stick
out
from
the
edge
or
surface
of
a
tool
or
machine
part
β’
One
tooth
on
the
zipper
was
bent
,
so
it
wouldn't
close
properly
.
One
tooth
on
the
zipper
was
bent
,
so
it
wouldn't
close
properly
.
β’
The
mechanic
noticed
that
a
tooth
had
broken
off
the
gear
wheel
.
The
mechanic
noticed
that
a
tooth
had
broken
off
the
gear
wheel
.
noun
-
tooth
,
teeth
a
strong
desire
or
liking
for
a
particular
kind
of
food
,
especially
sweet
food
β’
I
have
a
sweet tooth
,
so
desserts
are
hard
to
resist
.
I
have
a
sweet tooth
,
so
desserts
are
hard
to
resist
.
β’
Even
after
dinner
,
her
sweet tooth
made
her
look
for
chocolate
.
Even
after
dinner
,
her
sweet tooth
made
her
look
for
chocolate
.
volunteer
noun
a
person
who
offers
to
do
a
job
or
give
help
without
being
paid
β’
After
the
flood
,
many
volunteers
came
to
help
clean
the
streets
.
After
the
flood
,
many
volunteers
came
to
help
clean
the
streets
.
β’
Luis
became
a
volunteer
at
the
animal
shelter
on
weekends
.
Luis
became
a
volunteer
at
the
animal
shelter
on
weekends
.
From
Latin
β
voluntarius
β
meaning
β
of
one
β
s
free
will
β.
verb
-
volunteer
,
volunteering
,
volunteers
,
volunteered
to
offer
to
do
something
or
give
information
without
being
asked
and
usually
without
payment
β’
Maya
volunteered
to
organize
the
class
trip
.
Maya
volunteered
to
organize
the
class
trip
.
β’
I
volunteer
at
the
food
bank
every
Friday
evening
.
I
volunteer
at
the
food
bank
every
Friday
evening
.
Verb
use
from
the
noun
meaning
β
one
who
offers
freely
β.
adjective
done
,
made
,
or
given
by
free
choice
,
especially
without
payment
or
official
requirement
β’
She
teaches
a
volunteer
English
class
for
immigrants
.
She
teaches
a
volunteer
English
class
for
immigrants
.
β’
The
festival
depends
on
volunteer
staff
to
keep
costs
low
.
The
festival
depends
on
volunteer
staff
to
keep
costs
low
.
Adjective
sense
evolved
from
the
noun
in
the
early
19th
century
.
noun
a
person
who
joins
the
armed
forces
freely
rather
than
because
of
a
draft
or
conscription
β’
During
World
War
I
,
thousands
of
young
men
signed
up
as
volunteers
.
During
World
War
I
,
thousands
of
young
men
signed
up
as
volunteers
.
β’
The
army
relied
heavily
on
volunteer
soldiers
during
the
early
years
of
the
conflict
.
The
army
relied
heavily
on
volunteer
soldiers
during
the
early
years
of
the
conflict
.
Extended
military
sense
recorded
from
the
17th
century
.
noun
a
plant
that
grows
on
its
own
without
being
deliberately
planted
β’
The
farmer
pulled
out
the
corn
volunteers
sprouting
between
the
soybean
rows
.
The
farmer
pulled
out
the
corn
volunteers
sprouting
between
the
soybean
rows
.
β’
Gardeners
sometimes
let
tomato
volunteers
grow
to
see
what
fruit
they
produce
.
Gardeners
sometimes
let
tomato
volunteers
grow
to
see
what
fruit
they
produce
.
Botanical
use
recorded
from
the
19th
century
,
by
analogy
with
people
who
volunteer
.
steel
noun
-
steel
a
strong
,
hard
metal
made
mainly
from
iron
and
carbon
that
is
used
to
build
structures
,
machines
,
tools
,
and
many
everyday
objects
β’
The
skyscraper's
frame
is
made
of
steel
.
The
skyscraper's
frame
is
made
of
steel
.
β’
Workers
poured
molten
steel
into
molds
at
the
factory
.
Workers
poured
molten
steel
into
molds
at
the
factory
.
Old
English
stΔle
,
from
Proto-Germanic
*stahlijΔ
,
meaning
β
steel
,
firm
metal
.β
adjective
made
of
or
consisting
of
steel
β’
The
heavy
steel
door
slammed
shut
behind
us
.
The
heavy
steel
door
slammed
shut
behind
us
.
β’
A
long
steel
bridge
stretched
across
the
river
.
A
long
steel
bridge
stretched
across
the
river
.
Attributive
use
of
the
noun
steel
;
first
recorded
in
the
late
Middle
English
period
.
verb
to
make
yourself
or
someone
else
mentally
strong
and
ready
to
face
something
difficult
or
unpleasant
β’
He
steeled
himself
before
announcing
the
bad
news
to
the
team
.
He
steeled
himself
before
announcing
the
bad
news
to
the
team
.
β’
She
took
a
deep
breath
and
steeled
herself
for
the
final
exam
.
She
took
a
deep
breath
and
steeled
herself
for
the
final
exam
.
From
the
noun
steel
,
metaphorically
extending
the
idea
of
hardness
and
toughness
to
mental
strength
in
the
17th
century
.
guarantee
noun
a
written
or
spoken
promise
,
especially
that
a
product
will
be
repaired
,
replaced
,
or
money
returned
if
it
is
not
satisfactory
β’
The
washing
machine
comes
with
a
two-year
guarantee
against
mechanical
faults
.
The
washing
machine
comes
with
a
two-year
guarantee
against
mechanical
faults
.
β’
Keep
the
receipt
as
proof
of
the
guarantee
.
Keep
the
receipt
as
proof
of
the
guarantee
.
Late
17th
century
from
Spanish
β
garantΓa
β,
based
on
French
β
garant
β
meaning
β
guarantor
β.
verb
-
guarantee
,
guaranteeing
,
guarantees
,
guaranteed
to
promise
or
make
certain
that
something
will
happen
or
be
of
a
particular
standard
β’
We
guarantee
delivery
within
24
hours
.
We
guarantee
delivery
within
24
hours
.
β’
The
new
brakes
guarantee
shorter
stopping
distances
.
The
new
brakes
guarantee
shorter
stopping
distances
.
noun
something
that
makes
an
event
or
result
certain
or
very
likely
β’
Hard
work
is
the
best
guarantee
of
success
.
Hard
work
is
the
best
guarantee
of
success
.
β’
A
good
night's
sleep
is
no
guarantee
that
you
will
win
the
race
.
A
good
night's
sleep
is
no
guarantee
that
you
will
win
the
race
.
fifteen
determiner
used
before
a
noun
to
show
that
there
are
15
of
something
β’
We
need
fifteen
chairs
for
the
meeting
.
We
need
fifteen
chairs
for
the
meeting
.
β’
There
are
fifteen
students
in
my
class
.
There
are
fifteen
students
in
my
class
.
noun
-
fifteen
the
number
15
β’
Fifteen
is
half
of
thirty
.
Fifteen
is
half
of
thirty
.
β’
Her
lucky
number
is
fifteen
.
Her
lucky
number
is
fifteen
.