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mental
adjective
relating
to
the
mind
,
thinking
,
or
emotional
processes
rather
than
the
body
•
After
the
accident
,
he
needed
time
for
mental
recovery
before
going
back
to
work
.
After
the
accident
,
he
needed
time
for
mental
recovery
before
going
back
to
work
.
•
Puzzles
like
chess
are
good
mental
exercise
for
older
adults
.
Puzzles
like
chess
are
good
mental
exercise
for
older
adults
.
From
late
Latin
mentalis
,
from
Latin
mens
“
mind
”.
adjective
(
informal
)
crazy
,
wild
,
or
extremely
exciting
•
That
roller
coaster
was
absolutely
mental
!
That
roller
coaster
was
absolutely
mental
!
•
My
friends
went
mental
when
they
heard
the
band
announce
a
surprise
show
.
My
friends
went
mental
when
they
heard
the
band
announce
a
surprise
show
.
Extension
of
the
standard
adjective
"
mental
"
to
slang
meaning
"
crazy
"
in
British
English
,
recorded
since
the
late
20th
century
.
adjective
(
anatomy
)
situated
near
or
relating
to
the
chin
•
The
dentist
injected
anesthesia
near
the
patient's
mental
nerve
.
The
dentist
injected
anesthesia
near
the
patient's
mental
nerve
.
•
A
small
cut
was
found
on
the
mental
region
after
the
fall
.
A
small
cut
was
found
on
the
mental
region
after
the
fall
.
From
Latin
mentum
“
chin
”,
giving
a
separate
anatomical
sense
distinct
from
the
mind-related
meaning
.
environmental
adjective
connected
with
the
natural
world
and
how
human
activities
affect
it
•
The
city
launched
an
environmental
campaign
to
reduce
plastic
waste
.
The
city
launched
an
environmental
campaign
to
reduce
plastic
waste
.
•
Many
students
joined
the
school
’
s
environmental
club
to
plant
trees
around
campus
.
Many
students
joined
the
school
’
s
environmental
club
to
plant
trees
around
campus
.
Formed
from
environment
+
-al
in
the
late
19th
century
to
describe
matters
concerning
the
natural
surroundings
.
adjective
relating
to
the
physical
or
social
surroundings
that
influence
how
someone
or
something
behaves
or
develops
•
Good
lighting
is
an
environmental
factor
that
affects
productivity
.
Good
lighting
is
an
environmental
factor
that
affects
productivity
.
•
The
study
looked
at
the
environmental
risks
in
the
workplace
.
The
study
looked
at
the
environmental
risks
in
the
workplace
.
Extension
of
sense
from
the
natural
world
to
any
set
of
surrounding
conditions
in
early
20th
century
academic
writing
.
fundamental
adjective
forming
the
basic
and
most
important
part
of
something
•
Understanding
the
water
cycle
is
fundamental
to
grasping
how
weather
works
.
Understanding
the
water
cycle
is
fundamental
to
grasping
how
weather
works
.
•
Trust
is
fundamental
in
any
strong
friendship
.
Trust
is
fundamental
in
any
strong
friendship
.
From
late
Latin
fundamentalis
“
of
the
foundation
”,
from
Latin
fundamentum
“
foundation
”.
noun
a
basic
principle
,
rule
,
or
fact
that
is
essential
to
understanding
something
•
Before
learning
algebra
,
you
must
master
the
fundamentals
of
basic
arithmetic
.
Before
learning
algebra
,
you
must
master
the
fundamentals
of
basic
arithmetic
.
•
The
professor
began
the
biology
course
by
explaining
the
fundamental
of
cell
theory
.
The
professor
began
the
biology
course
by
explaining
the
fundamental
of
cell
theory
.
same
as
adjective
sense
noun
the
lowest
natural
frequency
at
which
something
vibrates
,
producing
the
main
pitch
of
a
sound
•
The
fundamental
of
the
note
A
is
440
hertz
.
The
fundamental
of
the
note
A
is
440
hertz
.
•
You
can
hear
the
overtones
as
well
as
the
fundamental
when
the
guitar
string
is
plucked
.
You
can
hear
the
overtones
as
well
as
the
fundamental
when
the
guitar
string
is
plucked
.
technical
extension
of
the
general
noun
sense
to
acoustics
and
physics
experimental
adjective
made
or
done
to
test
an
idea
scientifically
and
see
what
happens
•
The
experimental
vaccine
was
tested
on
volunteers
.
The
experimental
vaccine
was
tested
on
volunteers
.
•
A
team
of
engineers
built
an
experimental
car
that
runs
on
algae
.
A
team
of
engineers
built
an
experimental
car
that
runs
on
algae
.
From
experiment
+-al
,
first
recorded
in
the
early
1600s
.
adjective
using
new
and
unusual
ideas
,
styles
,
or
methods
,
and
not
yet
widely
accepted
•
The
director's
experimental
film
had
no
dialogue
at
all
.
The
director's
experimental
film
had
no
dialogue
at
all
.
•
He
loves
listening
to
experimental
jazz
that
mixes
electronic
sounds
.
He
loves
listening
to
experimental
jazz
that
mixes
electronic
sounds
.
From
experiment
+-al
,
broadened
in
the
early
1900s
to
arts
and
culture
.
