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essential    音標拼音: [ɪs'ɛnʃəl] [is'ɛnʃəl] [əs'ɛntʃəl] [is'ɛntʃəl]
a. 必要的,必不可少的;本質的,基本的
n. 要素,要點

必要的,必不可少的;本質的,基本的要素,要點

essential
*本質 基本的

essential
adj 1: absolutely necessary; vitally necessary; "essential tools
and materials"; "funds essential to the completion of the
project"; "an indispensable worker" [synonym: {essential},
{indispensable}]
2: basic and fundamental; "the essential feature" [ant:
{inessential}, {unessential}]
3: of the greatest importance; "the all-important subject of
disarmament"; "crucial information"; "in chess cool nerves
are of the essence" [synonym: {all-important(a)}, {all
important(p)}, {crucial}, {essential}, {of the essence(p)}]
4: being or relating to or containing the essence of a plant
etc; "essential oil"
5: defining rights and duties as opposed to giving the rules by
which rights and duties are established; "substantive law"
[synonym: {substantive}, {essential}] [ant: {adjective},
{procedural}]
n 1: anything indispensable; "food and shelter are necessities
of life"; "the essentials of the good life"; "allow farmers
to buy their requirements under favorable conditions"; "a
place where the requisites of water fuel and fodder can be
obtained" [synonym: {necessity}, {essential}, {requirement},
{requisite}, {necessary}] [ant: {inessential},
{nonessential}]

Essential \Es*sen"tial\ ([e^]s*s[e^]n"sjal), a. [Cf. F.
essentiel. See {Essence}.]
1. Belonging to the essence, or that which makes an object,
or class of objects, what it is.
[1913 Webster]

Majestic as the voice sometimes became, there was
forever in it an essential character of
plaintiveness. --Hawthorne.
[1913 Webster]

2. Hence, really existing; existent.
[1913 Webster]

Is it true, that thou art but a name,
And no essential thing? --Webster
(1623).
[1913 Webster]

3. Important in the highest degree; indispensable to the
attainment of an object; indispensably necessary.
[1913 Webster]

Judgment's more essential to a general
Than courage. --Denham.
[1913 Webster]

How to live? -- that is the essential question for
us. --H. Spencer.
[1913 Webster]

4. Containing the essence or characteristic portion of a
substance, as of a plant; highly rectified; pure; hence,
unmixed; as, an essential oil. "Mine own essential
horror." --Ford.
[1913 Webster]

5. (Mus.) Necessary; indispensable; -- said of those tones
which constitute a chord, in distinction from ornamental
or passing tones.
[1913 Webster]

6. (Med.) Idiopathic; independent of other diseases.
[1913 Webster]

{Essential character} (Biol.), the prominent characteristics
which serve to distinguish one genus, species, etc., from
another.

{Essential disease}, {Essential fever} (Med.), one that is
not dependent on another.

{Essential oils} (Chem.), a class of volatile oils, extracted
from plants, fruits, or flowers, having each its
characteristic odor, and hot burning taste. They are used
in essences, perfumery, etc., and include many varieties
of compounds; as {lemon oil} is a terpene, {oil of bitter
almonds} an aldehyde, {oil of wintergreen} an ethereal
salt, etc.; -- called also {volatile oils} in distinction
from the fixed or nonvolatile.
[1913 Webster]


Essential \Es*sen"tial\ ([e^]s*s[e^]n"sjal), n.
1. Existence; being. [Obs.] --Milton.
[1913 Webster]

2. That which is essential; first or constituent principle;
as, the essentials of religion.
[1913 Webster]

183 Moby Thesaurus words for "essential":
ab ovo, austere, axiom, bare, bare necessities, basal, basic,
basilar, bedrock, bench mark, brass tacks, call for, called for,
capital, cardinal, cardinal point, center, central, chaste, chief,
chief thing, climax, condition, congenital, connate, constituent,
constitutional, constitutive, core, cornerstone, crisis,
critical point, crux, deep-seated, demand, demand for,
desideration, desideratum, element, elemental, elementary, elixir,
essence, essential facts, essential matter, essentials, flower,
focal, focus, foremost, fundamental, gist, gravamen, great point,
gut, heart, high point, homely, homespun, homogeneous, hypostasis,
imperative, important, important thing, inborn, inbred, indicated,
indispensable, indivisible, innate, inner essence, intrinsic,
irreducible, irreductible, irreplaceable, issue, kernel, key,
keystone, landmark, leading, life-and-death, life-or-death, main,
main point, main thing, marrow, material, material point, meat,
mere, milestone, monolithic, must, must item, necessaries,
necessary, necessities, necessitous, necessity, need, need for,
needed, needful, nub, nucleus, nuts and bolts, occasion,
of a piece, of the essence, of vital importance, original,
part and parcel, pith, pivot, plain, postulate, prerequirement,
prerequisite, primal, primary, prime, primitive, principal,
principle, pure, pure and simple, quid, quiddity, quintessence,
quintessential, radical, real issue, required, requirement,
requisite, requisition, right-hand, rudiment, rudimentary,
salient point, sap, severe, simon-pure, simple, sine qua non,
single, soul, spare, spirit, stark, stuff, substance, substantial,
substantive, substantive point, the bottom line, the data,
the details, the dope, the facts, the information, the necessary,
the needful, the nitty-gritty, the particulars, the picture,
the point, the scoop, the score, the specifics, the whole story,
turning point, unadorned, uncluttered, underlying, undifferenced,
undifferentiated, unforgoable, uniform, vital, want, wanted

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