| Main Entry: | indispensable |
| Part of Speech: | adjective |
| Definition: | necessary |
Synonyms: |
basal, basic, cardinal, crucial, essential, fundamental, imperative, key, necessitous, needed, needful, prerequisite, primary, required, requisite, vital |
Antonyms: |
dispensable, needless, nonessential, redundant, superfluous, unnecessary |
| Main Entry: | basic |
| Part of Speech: | adjective |
| Definition: | elementary, fundamental |
Synonyms: |
basal, capital, central, chief, elemental, essential, indispensable, inherent, intrinsic, key, main, necessary, primary, primitive, principal, radical, substratal, underlying, vital |
Antonyms: |
additional, extra, inessential, nonessential, outside, peripheral, secondary |
| Main Entry: | cardinal |
| Part of Speech: | adjective |
| Definition: | important, key |
Synonyms: |
basal, basic, central, chief, constitutive, essential, first, foremost, fundamental, greatest, highest, indispensable, leading, main, overriding, overruling, paramount, pivotal, preeminent, primary, prime, principal, ruling, vital |
Antonyms: |
inessential, insignificant, minor, negligible, secondary, unimportant |
| Main Entry: | essential |
| Part of Speech: | adjective |
| Definition: | important, vital |
Synonyms: |
capital, cardinal, chief, constitutive, crucial, foremost, fundamental, imperative, indispensable, leading, main, necessary, necessitous, needed, needful, prerequisite, principal, required, requisite, right-hand, wanted |
| Notes: | the words crucial, essential, and vital cannot be qualified (cannot be more or less...) |
Antonyms: |
accessory, auxiliary, inessential, minor, nonessential, secondary, subsidiary, unimportant |
| Main Entry: | fundamental |
| Part of Speech: | adjective |
| Definition: | basic, important |
Synonyms: |
axiological, axiomatic, basal, bottom, bottom-line, cardinal, central, constitutional, constitutive, crucial, elemental, elementary, essential, first, foundational, grass-roots, indispensable, integral, intrinsic, key, major, meat-and-potatoes, necessary, organic, original, paramount, primary, prime, primitive, primordial, principal, radical, requisite, rudimentary, significant, structural, substratal, substrative, supporting, sustaining, theoretical, underived, underlying, vital |
Antonyms: |
additional, advanced, auxiliary, extra, minor, secondary, subordinate, trivial, unimportant |
| Main Entry: | imperative |
| Part of Speech: | adjective |
| Definition: | necessary |
Synonyms: |
acute, burning, clamant, clamorous, compulsory, critical, crucial, crying, essential, exigent, immediate, important, importunate, indispensable, inescapable, insistent, instant, no turning back, obligatory, pressing, urgent, vital |
Antonyms: |
inessential, optional, secondary, unnecessary, voluntary |
| Main Entry: | inherent |
| Part of Speech: | adjective |
| Definition: | basic, hereditary |
Synonyms: |
built-in, characteristic, congenital, connate, constitutional, deep-rooted, deep-seated, distinctive, elementary, essential, fixed, fundamental, genetic, immanent, implicit, in the grain, inborn, inbred, inbuilt, indigenous, indispensable, individual, indwelling, ingrained, inherited, innate, inner, instinctive, integral, integrated, internal, intimate, intrinsic, inward, latent, native, natural, original, part and parcel, resident, running in the family, subjective, unalienable |
Antonyms: |
acquired, added, external, extrinsic, incidental, learned |
| Main Entry: | integral |
| Part of Speech: | adjective |
| Definition: | necessary, basic |
Synonyms: |
component, constituent, elemental, essential, fundamental, indispensable, intrinsic, requisite |
Antonyms: |
extrinsic, secondary, supplemental, unnecessary |
| Main Entry: | key |
| Part of Speech: | adjective |
| Definition: | essential, important |
Synonyms: |
basic, chief, crucial, decisive, fundamental, indispensable, leading, main, major, material, pivotal, primary, principal, vital |
Antonyms: |
inessential, insignificant, nonessential, unimportant |
| Main Entry: | life-and-death |
| Part of Speech: | adjective |
| Definition: | extremely important |
Synonyms: |
all-important, consequential, critical, crucial, determining, earth-shaking, earth-shattering, essential, imperative, important, indispensable, life or death, meaningful, of vital importance, paramount, pivotal, serious, significant, urgent, vital, vitally important |