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essential
adjective
absolutely
necessary
;
extremely
important
•
Water
is
essential
for
all
forms
of
life
.
Water
is
essential
for
all
forms
of
life
.
•
It's
essential
that
you
bring
your
passport
to
the
airport
.
It's
essential
that
you
bring
your
passport
to
the
airport
.
noun
something
that
is
absolutely
necessary
;
a
basic
or
indispensable
item
•
She
packed
only
the
essentials
for
the
camping
trip
.
She
packed
only
the
essentials
for
the
camping
trip
.
•
The
guide
covers
the
essentials
of
first
aid
.
The
guide
covers
the
essentials
of
first
aid
.
adjective
forming
the
basic
or
most
important
part
of
something
;
fundamental
•
Understanding
fractions
is
essential
knowledge
for
higher-level
math
.
Understanding
fractions
is
essential
knowledge
for
higher-level
math
.
•
Freedom
of
speech
is
essential
to
a
democratic
society
.
Freedom
of
speech
is
essential
to
a
democratic
society
.
adjective
(
medical
)
describing
a
disease
or
condition
that
arises
on
its
own
and
is
not
caused
by
another
illness
;
idiopathic
•
The
patient
was
diagnosed
with
essential
hypertension
.
The
patient
was
diagnosed
with
essential
hypertension
.
•
Researchers
still
don't
fully
understand
essential
tremor
.
Researchers
still
don't
fully
understand
essential
tremor
.
essentially
adverb
in
its
most
basic
or
fundamental
form
;
in
essence
•
A
diamond
is
essentially
pure
carbon
arranged
in
a
crystal
lattice
.
A
diamond
is
essentially
pure
carbon
arranged
in
a
crystal
lattice
.
•
Although
the
two
proposals
look
different
,
they
are
essentially
the
same
in
purpose
.
Although
the
two
proposals
look
different
,
they
are
essentially
the
same
in
purpose
.
adverb
for
the
most
part
;
basically
;
almost
entirely
•
The
restaurant
was
essentially
empty
by
the
time
we
arrived
.
The
restaurant
was
essentially
empty
by
the
time
we
arrived
.
•
She
did
essentially
all
the
work
herself
.
She
did
essentially
all
the
work
herself
.
