# essential

/ɛˈsɛnʃəɫ/ (US) · /ɪsˈɛnʃəl/ (UK)

Source: https://englishreference.com/word/essential
Updated: 2026-06-19

## Senses

### 1. necessary

adjective · CEFR B1

completely necessary for something to happen or succeed.

For teachers: absolutely necessary or indispensable for the completion or success of a task or process.

- Good communication is essential for a healthy relationship.
- Thorough market research is essential to the success of any new business venture in such a competitive landscape.

Usage: often followed by the preposition 'to' or 'for'

### 2. basic or fundamental

adjective · CEFR B2

relating to the most basic and important part of something.

For teachers: relating to the essence or fundamental nature of a person, thing, or concept.

- The essential difference between the two cars is the engine size.
- The artist's work captures the essential spirit of the countryside without relying on traditional landscape techniques.

### 3. biological requirement

adjective · CEFR C1 · Technical

describing a nutrient that your body needs but cannot make itself, so you must eat it.

For teachers: denoting a nutrient, such as an amino acid or fatty acid, that is required for normal physiological function but cannot be synthesized by the body.

- Leafy greens provide many of the essential vitamins our bodies need.
- There are nine essential amino acids that humans must obtain through their diet because the body lacks the metabolic pathways to produce them.

Usage: frequently used in the phrases 'essential amino acids' or 'essential oils'

Teaching tip: In biology, 'essential' has a very specific meaning regarding synthesis rather than just being 'important'.

### 4. a basic requirement

noun · CEFR B1

a basic thing that you cannot live or work without.

For teachers: a fundamental element or a basic necessity required for a particular purpose.

- We only packed the essentials like water, a map, and a first-aid kit.
- The relief agency focused on providing essentials such as clean water and temporary shelter to the displaced families.

Usage: usually used in the plural form 'essentials'

## Examples

- We packed only the essentials for our camping trip.
- The charity provides local families with food, clean water, and other daily essentials during the winter months.
- While the luxury features are attractive, the committee must first ensure the budget covers the essentials of structural safety and accessibility.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.