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essential - basic and fundamental; "the essential feature" |
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inessential,
unessential not basic or fundamental
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crucial,
important of extreme importance; vital to the resolution of a crisis; "a crucial moment in his career"; "a crucial election"; "a crucial issue for women"
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important,
of import of great significance or value; "important people"; "the important questions of the day"
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indispensable unavoidable; "the routine but indispensable ceremonies of state"
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intrinsic,
intrinsical situated within or belonging solely to the organ or body part on which it acts; "intrinsic muscles"
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necessary unavoidably determined by prior circumstances; "the necessary consequences of one's actions"
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primary not derived from or reducible to something else; basic; "a primary instinct"
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unexpendable not suitable to be expended
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essentiality,
essentialness basic importance
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basal,
primary of primary importance
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biogenic essential for maintaining the fundamental life processes; "sleep and food and water are among the biogenic needs of the organism"
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constituent,
constitutional,
constitutive,
organic sanctioned by or consistent with or operating under the law determining the fundamental political principles of a government; "the constitutional right of free speech"; "constitutional government"; "constitutional guarantees"
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must
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no-frills
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staple necessary or important, especially regarding food or commodities; "wheat is a staple crop"
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substantial,
substantive having substance or capable of being treated as fact; not imaginary; "the substantial world"; "a mere dream, neither substantial nor practical"; "most ponderous and substantial things"- Shakespeare
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virtual
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life-sustaining,
vital manifesting or characteristic of life; "a vital, living organism"; "vital signs"
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| 2. |
essential - absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker" |
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indispensable |
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necessary unavoidably determined by prior circumstances; "the necessary consequences of one's actions"
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| 3. |
essential - being or relating to or containing the essence of a plant etc; "essential oil" |