break down

phrasal verb·6 senses·particle down

Meanings

1

(of a vehicle or machine) stop working

Why “down”? A structure, a system, or someone's mood can go down when it fails.

The car broke down on the motorway.
The car stopped working on the motorway.
The lift broke down again.
The lift stopped working again.
2

Lose emotional control and start crying

She broke down at the funeral.
She lost emotional control and cried at the funeral.
He broke down after the call.
He lost emotional control and started crying after the call.
3

Separate something into smaller parts to understand it

Why “down”? You move from the whole thing to the smaller parts, so you can understand it.

Let's break the costs down.
Let's separate the costs into smaller parts.
The teacher broke the poem down line by line.
The teacher separated the poem into smaller parts to explain it.
Let's break down the problem step by step.
Let's analyse the problem one step at a time.
4

(of negotiations or relationships) fail or end

Talks broke down after a week.
Negotiations failed after a week.
Their agreement broke down quickly.
Their agreement failed quickly.
5

Force a door open by hitting it

Why “down”? Movement goes from high to low.

Police had to break the door down.
Police had to force the door open.
Firefighters broke the door down.
Firefighters forced the door open by hitting it.
6

Decompose into simpler chemical substances

Why “down”? A whole loses its structure and breaks into simpler parts.

Plastic doesn't break down quickly.
Plastic doesn't decompose quickly.
Leaves break down into soil.
Leaves decompose into soil.

Don't confuse with

break downbreak up

Break down means stop working. Break up means end a relationship or gathering.

break downbreak out

Break down means stop working. Break out means start suddenly.

Test yourself

The car broke down on the motorway. What does it mean?

Nearby in the meaning map

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Tell it apart

Side-by-side comparisons with the verbs learners most often confuse for “break down”.

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