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Definitions

essential

[uh-sen-shuhl] / əˈsɛn ʃəl /
ADJECTIVE
important, vital
Synonyms
STRONGEST
crucial fundamental imperative important indispensable main necessary needed vital
STRONG
capital cardinal chief leading prerequisite principal requisite
WEAK
constitutive foremost must-have necessitous needful required right-hand wanted
Antonyms
STRONGEST
auxiliary extra inessential minor needless nonessential optional secondary subordinate trivial unimportant unnecessary voluntary
STRONG
inferior
WEAK
accessory atypical subsidiary
ADJECTIVE
basic, fundamental
Synonyms
STRONGEST
absolute constitutional elemental inherent intrinsic key main underlying
STRONG
cardinal cold ideal material nitty-gritty nub perfect primary prime primitive principal
WEAK
basal bottom-line complete congenital connate deep-seated elementary inborn inbred innate meat-and-potatoes quintessential substratal
Antonyms
STRONGEST
acquired extrinsic incidental inessential insignificant learned nonessential secondary unimportant
STRONG
flawed imperfect minor wrong
WEAK
accessory atypical auxiliary subsidiary
NOUN
necessity, basic
Synonyms
STRONGEST
condition element essence fundamental must precondition prerequisite principle requirement requisite
STRONG
ABCs groceries guts heart nitty-gritty quintessence rudiment stuff substance
WEAK
bottom line brass tacks fire and ice meat and potatoes name of the game nuts and bolts part and parcel sine qua non vital part where one's at
Antonyms
STRONGEST
extra
WEAK
accessory auxiliary nonessential subsidiary throwaway

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Foster notes that Snow Secure was essential in making sure Sun Peaks met its opening date.

From Slate • Apr. 11, 2026

According to the team, a naturally occurring network of structural defects allows electrical charges to travel long distances through the material, which is essential for efficient energy conversion.

From Science Daily • Apr. 10, 2026

President Donald Trump ordered the department to find funds to compensate essential workers required to stay on the job, allowing some back pay to be issued in recent weeks.

From Barron's • Apr. 10, 2026

Professional victim support is essential and "can sometimes even be a matter of life and death" due to the shame, intense fear, despair and constant pressure being so overwhelming.

From BBC • Apr. 10, 2026

But that left him with the grim task of determining which employees were essential and asking them to stay.

From "Meltdown" by Deirdre Langeland

Vocabulary lists containing essential

Jim Burke's Academic Vocabulary List

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List 2

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Academic Vocabulary Toolkit 1, Words 41-50

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