declutch

declutch — verb

  • declutchpresent simple I / you / we / they
  • declutches3rd person singular
  • declutching-ing form
  • declutchedpast simple

1. to press the clutch pedal in a vehicle so that the engine stops driving the whee

1.verbintransitiveC1
Definition

to press the clutch pedal in a vehicle so that the engine stops driving the wheels, usually before you change gear.

Example

Omar had to declutch smoothly as the old bus crawled up the steep hill.

declutch before changing gear

The driving instructor told Tanvi to declutch gently before slowing for the corner.

declutch + before + action

Common collocations
  • declutch smoothly
  • declutch gently
  • declutch fully
Synonyms
  • disengage

    more technical; used of the clutch mechanism itself, not the whole driving action

Antonyms
  • engage

    to let the clutch back so the engine drives the wheels again

Grammar Patterns

declutch (before [action])

Usage Note

Intransitive and chiefly British. The subject is always the driver, and the action almost always comes just before changing gear or stopping. American English usually says 'press the clutch' instead.

Common Mistakes

She declutched the car.
She declutched before the corner.
declutch takes no object; you declutch, you do not declutch something.

2. to stop a machine or one of its parts from working by freeing the clutch that co

2.verbtransitiveC2
Definition

to stop a machine or one of its parts from working by freeing the clutch that connects it to the power.

Example

The mechanic declutched the printing press before he reached inside to clear the jam.

declutch + machine part for safety

Ada declutched the spinning drum so the workers could load it safely.

Common collocations
  • declutch the drive
  • declutch the mechanism
Synonyms
  • disengage

    the everyday word an engineer would more often use for a machine part

Antonyms
  • engage

    to connect the part to the power again so it runs

Grammar Patterns

declutch + [machine part]

Usage Note

Transitive and technical, found mostly in engineering manuals. Distinguish from sense 1: here the object is a machine or moving part, whereas sense 1 has no object and refers to driving a vehicle.

Word family

Synonym discussion

Sense: verb/1

These words all touch on what happens when an engine stops driving the wheels, but they are not interchangeable. 'Declutch' is a chiefly British, fairly technical verb describing the driver's deliberate action of pressing the clutch pedal, almost always just before changing gear. 'Disengage' is broader and more formal: you disengage the clutch, the gears, or even a self-driving mode, and the subject can be a person or a system. 'Stall' is what goes wrong when you fail to declutch in time — the engine accidentally stops because it is overloaded, so it is unplanned and usually unwanted. For example, 'Omar declutched before the hill' is a controlled choice, while 'the engine stalled on the hill' is a mistake. Use 'declutch' for the driving skill, 'disengage' for the wider mechanical idea, and 'stall' for the failure.

declutch ↗disengage ↗stall ↗

Common collocations

Adverbs

  • declutch smoothly
  • declutch gently
  • declutch quickly

Phrases

  • declutch and brake

Prepositions

  • declutch before [a gear change]

Etymology

Latin (de-)English (clutch)English (declutch)

Declutch was built in English in the early days of motoring, around the start of the twentieth century. It joins the prefix 'de-', meaning 'to undo or reverse', to the noun 'clutch', the device that connects an engine to the wheels. So to declutch is literally to 'un-clutch' — to break that connection for a moment. The word stayed mostly British as American drivers tended to describe the same action in plainer words.