A2 noun #563 よく出る 2分で読める

sufficient

Sufficient means having as much as you need.

Explanation at your level:

Think of the word 'enough.' If you have sufficient water, it means you have enough water to drink. You use it when you want to say something is okay and you do not need more.

When you are doing a task, you need sufficient time. This means you have enough time to finish. It is a formal way to say 'enough' in school or work.

In intermediate English, sufficient is used to show that a condition has been met. For example, 'There is sufficient evidence to prove the theory.' It makes your sentences sound more professional and precise.

At this level, you can use sufficient to replace 'enough' in essays. It shows a higher register. You might also use it in negative contexts, like 'insufficient,' which means not enough.

Advanced speakers use sufficient to nuance their arguments. You might discuss sufficient grounds for an appeal or sufficient capital for a business venture. It adds weight to your claims.

At the mastery level, sufficient is used in complex, abstract contexts. You might talk about sufficient conditions for a philosophical argument or sufficient resources in a global economic report. It is a cornerstone of academic and formal discourse.

30秒でわかる単語

  • Means enough
  • Formal tone
  • Adjective
  • Latin origin

Hey there! Let's talk about sufficient. It is a fantastic, slightly formal way to say 'enough.' Think of it as the Goldilocks of vocabulary—it is not too little, and it is not too much. It is just right.

When you say you have a sufficient amount of something, you are telling people that you have exactly what you need to succeed. Whether it is sufficient time to finish a test or sufficient food for a party, this word signals that your requirements are fully met.

The word sufficient comes to us from the Latin word sufficere, which is a combination of sub (meaning 'up from under') and facere (meaning 'to make or do').

Historically, it meant to 'make up' or 'supply' what was needed. It entered English through Old French in the 14th century. It is closely related to the word suffice, which is the verb form of this concept. Isn't it cool how words evolve from simple Latin roots to describe our modern needs?

You will hear sufficient most often in professional, academic, or formal settings. While you might say 'I have enough money' to a friend, you might say 'I have sufficient funds' to a bank manager.

Commonly, it pairs with nouns like evidence, time, reason, or data. It is a very precise word that helps you sound more authoritative and clear in your writing.

While 'sufficient' itself isn't the star of many idioms, it is often linked to phrases like:

  • Sufficient unto the day: Meaning don't worry about tomorrow yet.
  • More than sufficient: Used when you have a surplus.
  • Barely sufficient: Meaning just enough to get by.
  • Sufficient cause: A legal term for having a good reason.
  • Sufficient to the task: Being capable of doing the job.

Sufficient is an adjective, so it usually comes before a noun or after a verb like 'to be.' Pronunciation is /səˈfɪʃ.ənt/. The stress is on the second syllable: su-FISH-ent.

It rhymes with words like efficient and deficient. Remember, it is not usually used as a noun, so don't say 'a sufficient'—always use it to describe something else!

Fun Fact

It shares a root with the word 'factory'!

Pronunciation Guide

UK /səˈfɪʃ.ənt/

su-fish-ent

US /səˈfɪʃ.ənt/

su-fish-ent

Common Errors

  • mispronouncing the 'sh' sound
  • stressing the first syllable

Rhymes With

efficient deficient proficient omniscient prescient

Difficulty Rating

読解 2/5

easy

Writing 3/5

moderate

Speaking 3/5

moderate

リスニング 2/5

easy

What to Learn Next

Prerequisites

enough

Learn Next

adequate ample

上級

proficient

Grammar to Know

Adjective placement

The sufficient amount

Examples by Level

1

I have sufficient food.

enough food

adjective before noun

1

We have sufficient time to finish.

2

Is this sufficient for you?

3

He had sufficient money.

4

She needs sufficient rest.

5

They have sufficient supplies.

6

There is sufficient space here.

7

The light is sufficient.

8

Is that sufficient?

1

The evidence provided was sufficient.

2

We need sufficient proof.

3

She has sufficient experience.

4

Are these funds sufficient?

5

There is sufficient room for everyone.

6

The rain was sufficient for the crops.

7

The heat is sufficient.

8

He gave a sufficient explanation.

1

The data is sufficient to draw a conclusion.

2

We lack sufficient resources.

3

There is sufficient reason to doubt.

4

The measures were sufficient.

5

He had sufficient cause to leave.

6

The budget is sufficient.

7

Is the current security sufficient?

8

They made a sufficient effort.

1

The theory lacks sufficient empirical support.

2

There is sufficient justification for the change.

3

The evidence is sufficient to convict.

4

We must ensure sufficient oversight.

5

The system is sufficient for our needs.

6

Is the current policy sufficient?

7

There is sufficient evidence of growth.

8

They have sufficient power to act.

1

The argument provides a sufficient basis for debate.

2

There is sufficient complexity to warrant study.

3

He possesses sufficient gravitas for the role.

4

The allocation is sufficient for the project.

5

There is sufficient precedent for this action.

6

The evidence is sufficient to warrant investigation.

7

We have sufficient capacity to scale.

8

The result is sufficient to satisfy the board.

反対語

insufficient inadequate lacking

よく使う組み合わせ

sufficient evidence
sufficient time
sufficient funds
sufficient reason
sufficient space
sufficient proof
sufficient resources
sufficient support
sufficient information
sufficient quantity

Idioms & Expressions

"sufficient unto the day"

don't worry about tomorrow

Sufficient unto the day is the evil thereof.

literary

Easily Confused

sufficient vs efficient

similar sound

efficient means fast/good, sufficient means enough

An efficient worker is sufficient for the job.

Sentence Patterns

A1

Subject + is + sufficient

The money is sufficient.

語族

Nouns

sufficiency the state of being enough

Verbs

suffice to be enough

Adjectives

sufficient enough

関連

insufficient opposite

How to Use It

frequency

7

Formality Scale

formal neutral

よくある間違い

using as a noun use as an adjective
It is not a thing, it describes a thing.

Tips

💡

When to use

Use in essays, not with friends.

💡

Don't say 'a sufficient'

Always use it with a noun.

Memorize It

Mnemonic

Fish in the net: If you have enough fish, it is su-FISH-ent.

Visual Association

A scale balancing perfectly.

Word Web

enough plenty adequate satisfaction

チャレンジ

Use it in a professional email today.

語源

Latin

Original meaning: to make up

文化的な背景

None

Used often in legal and formal business documents.

Bible (Matthew 6:34)

Practice in Real Life

Real-World Contexts

Work

  • sufficient time
  • sufficient funds
  • sufficient staff

Conversation Starters

"Do you have sufficient time for your hobbies?"

Journal Prompts

Write about a time you had sufficient resources.

よくある質問

1 問

Yes, but sufficient is more formal.

自分をテスト

fill blank A1

I have ___ food for the trip.

正解! おしい! 正解: sufficient

It means enough.

multiple choice A2

What does sufficient mean?

正解! おしい! 正解: Enough

Sufficient is a synonym for enough.

true false B1

Is sufficient an adjective?

正解! おしい! 正解: 正しい

Yes, it describes nouns.

match pairs B1

Word

意味

All matched!

They are synonyms.

sentence order B2

下の単語をタップして文を組み立てよう
正解! おしい! 正解:

The evidence is sufficient.

スコア: /5

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