B1 verb #4 le plus courant 4 min de lecture

lock

To secure something so that it cannot be opened without a key or code.

Explanation at your level:

You use the word lock when you want to keep something safe. If you have a door, you turn the key to lock it. This means nobody can come inside. You can also lock a box or a bike. It is a very important word for safety!

When you lock something, you make sure it stays closed. For example, you lock your front door when you leave your house. You can also lock your computer screen so other people cannot see your files. It is a simple action that helps keep your things protected.

The verb lock is used to describe securing an object so it cannot be opened. We often use it with prepositions, such as 'locking up' a shop at the end of the day. It is also used figuratively, like 'locking in' a deal, which means making an agreement final and fixed.

Beyond the physical act of using a key, lock is frequently used in business and technical contexts. You might 'lock down' a system to prevent cyber threats or 'lock in' a mortgage rate to avoid future increases. The word implies a sense of permanence and protection against change.

In advanced English, lock takes on nuanced meanings related to commitment and restriction. We talk about being 'locked into' a contract, implying a lack of flexibility. It can also describe physical states, such as 'locking' a joint or a mechanism in place, emphasizing the transition from movement to a static, fixed state.

At the mastery level, lock serves as a metaphor for psychological and structural entrapment. We see it in literature to describe characters 'locked' in patterns of behavior or 'locked' in a stalemate. The etymological connection to containment allows for rich, descriptive usage that bridges the gap between physical security and abstract limitation.

Mot en 30 secondes

  • Lock means to secure with a key.
  • It is a regular verb.
  • It has many figurative uses.
  • Common phrasal verbs include lock up, lock in, and lock out.

When you lock something, you are essentially making it secure. Think of it as putting a barrier between your belongings and the rest of the world. Whether it is a physical door, a bicycle, or even a digital screen, the action is meant to keep things safe.

Beyond physical objects, the word can describe a state of being immovable. For example, if your car's brakes lock up, they stop moving entirely. It is a very versatile word that pops up in both our daily chores and our technical conversations.

In a social sense, we often talk about being locked in, which means being fully committed or focused on a task. It is a word that implies control, safety, and finality. Once you have locked a door, you know exactly where you stand!

The word lock has deep roots in Germanic history. It comes from the Old English word loc, which meant a bolt, bar, or enclosure. It is closely related to the Old Norse lok, meaning a lid or fastening.

Historically, the concept of a lock evolved from simple wooden bars used in ancient civilizations to the complex metal mechanisms we see today. The linguistic evolution tracks with our human need for security. We have always needed a way to define 'mine' versus 'yours' through physical barriers.

Interestingly, the word is also related to the concept of a 'loch' or 'lake' in some Celtic languages, referring to a body of water that is enclosed by land. This shared etymological history highlights the idea of containment—whether it is a secret kept behind a door or water held within a basin.

Using lock is straightforward, but it depends heavily on context. You lock a door, you lock a bike, or you lock your phone. These are standard, everyday uses that everyone understands.

When you move into more formal or figurative territory, you might hear phrases like locking horns, which means to have a disagreement. You might also hear about locking in a price, which is common in business when you want to guarantee a rate before it changes.

The register of the word is generally neutral. It is perfectly acceptable in both a casual text to a friend ('Did you lock the house?') and in a professional email ('We need to lock down the project timeline'). It is a reliable, high-frequency verb that rarely sounds out of place.

Lock, stock, and barrel: This means including everything or the entirety of something. Example: 'They sold the business, lock, stock, and barrel.'

Lock horns: To argue or disagree strongly. Example: 'The two managers often lock horns during meetings.'

Under lock and key: Kept very safely or hidden away. Example: 'The secret documents are kept under lock and key.'

Lock out: To prevent someone from entering a place. Example: 'I forgot my keys and got locked out of my apartment.'

Lock away: To put something in a safe place for a long time. Example: 'She locked her memories away in a diary.'

As a verb, lock is regular. Its past tense and past participle form is locked, and its present participle is locking. It is a transitive verb, meaning it usually takes a direct object (e.g., 'Lock the door').

The pronunciation is straightforward. In British English, it is /lɒk/, and in American English, it is /lɑːk/. The 'o' sound is the main difference, with the American version being slightly more open.

It rhymes with words like dock, rock, sock, clock, and block. Stress is always on the single syllable, making it a very punchy, definitive word to say. Just make sure to hit that final 'k' sound clearly to distinguish it from words like 'log'!

Fun Fact

Related to the word 'loch' (lake) through the idea of enclosure.

Pronunciation Guide

UK /lɒk/

Short 'o' sound like in 'hot'.

US /lɑːk/

Open 'ah' sound like in 'father'.

Common Errors

  • Pronouncing the 'l' too softly
  • Confusing with 'log'
  • Adding an extra syllable

Rhymes With

block clock dock rock sock

Difficulty Rating

Lecture 1/5

easy

Writing 2/5

moderate

Speaking 1/5

easy

Écoute 1/5

easy

What to Learn Next

Prerequisites

door key close

Learn Next

secure fasten protection

Avanc

deadlock interlock containment

Grammar to Know

Transitive Verbs

He locked the door.

Phrasal Verbs

Lock up, lock out.

Passive Voice

The door was locked.

Examples by Level

1

Please lock the door.

Turn the key to close.

Imperative verb.

2

I lock my bike.

Use a chain to secure.

Simple present.

3

Did you lock it?

Did you close it?

Past tense question.

4

Lock the box.

Secure the lid.

Verb + noun.

5

It is locked.

It is secure.

Passive participle.

6

Don't lock me out.

Let me enter.

Negative imperative.

7

I cannot lock this.

It is broken.

Modal verb.

8

Lock the gate.

Secure the entrance.

Verb + object.

1

I always lock my car.

2

She forgot to lock the window.

3

Can you lock the gate, please?

4

The shop is locked at night.

5

He locked his diary.

6

They locked the gate behind them.

7

Is the office locked?

8

Please lock the drawer.

1

We need to lock down the schedule.

2

He locked his keys inside the car.

3

The software locks automatically.

4

She felt locked into the job.

5

They locked horns over the budget.

6

The files are locked for editing.

7

Lock the screen before you leave.

8

The secret is locked away.

1

The company locked in a low interest rate.

2

We are locked in a fierce competition.

3

The system locks users after three attempts.

4

He remained locked in deep thought.

5

They have locked down the perimeter.

6

The agreement is now locked in.

7

She was locked in a bitter struggle.

8

The gears locked together perfectly.

1

The candidate is locked into a specific policy.

2

The mechanism locks the components in place.

3

We are locked in a stalemate regarding the contract.

4

The data is locked to prevent unauthorized access.

5

He was locked in a cycle of poverty.

6

The two parties were locked in negotiations for weeks.

7

The device locks the user out after a failure.

8

They are locked in a battle for supremacy.

1

The nation was locked in a state of mourning.

2

The narrative is locked in a recursive structure.

3

The artist was locked into a contract for ten years.

4

The gears locked with a satisfying click.

5

Their fates were locked together by history.

6

The memory was locked away in his subconscious.

7

The debate was locked in circular logic.

8

The process is locked to ensure total security.

Collocations courantes

lock the door
lock away
lock out
lock horns
lock in
lock tight
lock down
lock eyes
lock mechanism
under lock and key

Idioms & Expressions

"Lock, stock, and barrel"

Everything

He moved his office, lock, stock, and barrel.

casual

"Lock horns"

To argue

They locked horns over the new policy.

neutral

"Under lock and key"

Safely hidden

The gems are under lock and key.

neutral

"Lock out"

Prevent entry

I was locked out of my account.

neutral

"Lock away"

Hide or store safely

She locked away her fears.

neutral

"Lock in"

Secure a commitment

We need to lock in the dates.

business

Easily Confused

lock vs log

Similar sound

Log is wood or a record; lock is a fastener.

I wrote in my log vs I locked the door.

lock vs latch

Similar function

Latch is simpler.

Latch the gate vs lock the door.

lock vs bolt

Similar function

Bolt is a specific type of lock.

Bolt the door.

lock vs block

Similar sound

Block is to stop movement.

Block the path vs lock the door.

Sentence Patterns

A1

Subject + lock + object

I lock the door.

B1

Subject + lock + object + away

She locked her jewelry away.

B2

Subject + be + locked + in

They are locked in a debate.

B2

Subject + lock + out + object

The system locked out the user.

C1

Subject + lock + down + object

We locked down the server.

Famille de mots

Nouns

lock The mechanism

Verbs

unlock To open

Adjectives

locked In a secure state

Apparenté

padlock A type of lock

How to Use It

frequency

8/10

Formality Scale

formal neutral casual slang

Erreurs courantes

lock the key lock the door
You lock the object, not the tool used to lock it.
I am lock out I am locked out
Use the past participle for the state.
lock up the door lock the door
Up is redundant unless referring to the whole building.
lock to the door lock the door
Lock is a transitive verb; no preposition needed.
He is locking the gate closed He is locking the gate
Locking implies closing; 'closed' is redundant.

Tips

💡

Memory Palace

Imagine a key in your pocket every time you hear the word.

💡

Native Speaker Tip

Use 'lock up' for houses/shops.

🌍

Cultural Insight

Locks are symbols of trust and safety.

💡

Grammar Shortcut

Always add -ed for the past.

💡

Say It Right

End with a sharp 'k' sound.

💡

Don't Make This Mistake

Don't say 'lock the key'.

💡

Did You Know?

Locks are thousands of years old.

💡

Study Smart

Learn the phrasal verbs together.

Memorize It

Mnemonic

L-O-C-K: Leave Only Closed Keys.

Visual Association

A giant heavy padlock on a treasure chest.

Word Web

security safety key door protection

Défi

Try to identify every lock you see today.

Origine du mot

Old English

Original meaning: Bolt or bar

Contexte culturel

None

Used in everyday life for safety; metaphorically used in business.

'Lock, Stock and Two Smoking Barrels' (movie) 'Lock and Key' (song)

Practice in Real Life

Real-World Contexts

At home

  • Lock the door
  • Lock the window
  • Lock up at night

In business

  • Lock in a price
  • Lock down a deal
  • Locked into a contract

Technology

  • Lock the screen
  • Lock the file
  • Locked out of account

Travel

  • Lock your suitcase
  • Lock the hotel room
  • Locked out of the room

Conversation Starters

"Do you always remember to lock your door?"

"Have you ever been locked out of your house?"

"What is the most important thing to keep under lock and key?"

"Do you feel 'locked into' your current job or studies?"

"How do you feel about digital locks versus physical keys?"

Journal Prompts

Write about a time you were locked out.

Describe a secret you keep 'under lock and key'.

How does it feel to be 'locked into' a long-term commitment?

Imagine a world without locks—what would change?

Questions fréquentes

8 questions

It is both!

Use 'locked'.

A lock usually requires a key; a latch is a simple mechanical fastener.

Yes, it means to secure a whole building.

It can be, depending on the situation.

It means committed or fixed.

Yes, it prevents editing.

No, it is regular.

Teste-toi

fill blank A1

Please ___ the door.

Correct ! Pas tout à fait. Rponse correcte : lock

Lock is the verb for securing a door.

multiple choice A2

What does it mean to lock something?

Correct ! Pas tout à fait. Rponse correcte : To secure it

Locking secures an object.

true false B1

You can lock a conversation.

Correct ! Pas tout à fait. Rponse correcte : Faux

We usually say 'lock in' a deal, not lock a conversation.

match pairs B1

Word

Signification

All matched!

Matches phrasal verbs to meanings.

sentence order B2

Touche les mots ci-dessous pour construire la phrase
Correct ! Pas tout à fait. Rponse correcte :

Standard Subject-Verb-Object order.

Score : /5

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