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gear

gear

142 2.9
A wheel with teeth that makes parts of a machine move
  • noun
  • /ɡɪr/
: engranaje
  • So obviously this gear turns this gear, and this gear turns this gear.
  • gear ratio
  • gear shaft
  • gear pump

It's like going down the highway when first gear, you know, forever.

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Examples

  • I was only in second gear at the time.

  • I shifted down a couple of gears and hardly noticed the change.

    Fiction book (1991)
  • Trying to get a gear this big would be quite hard.

  • So what is a typical gear ratio for for a robot?

  • Mr. X, now Officer X, puts the car in gear and drives into the night.

    Fiction book (1991)
  • You just threw your car into gear and smashed into me.

  • Although versatile, each gear is restricted by its design and method of operation.

    Academic text (1995)
  • Now, these plastic blue gears are for the calendar wheel.

  • Furthermore, the gears had the added advantage of smoothing out the turning of the axle.

    Academic text (2012)
  • The mechanic replaced the broken gear to improve the machine's performance.

Synonyms

transmission
vsgear
  • Specialized
55 3.9

A system of gears in a vehicle that sends power from the engine to the wheels

is the general mechanical part-or-system term covering such sets
automatic transmission
vsgear
  • Specialized
7 3.7

A car system that changes gears by itself so the driver does not have to shift them

is the basic mechanical term for parts or systems without automation
train
vsgear
  • Specialized
5 7.7

A set of round parts with teeth that pass power along

is the simpler part-or-system term that can cover such a set
gearing
vsgear
  • Specialized
3 6.3

The parts in a machine that work together to change speed and force

is the actual part or system rather than only its arrangement
pinion
vsgear
  • Specialized
3 8.9

A small gear with few teeth that fits a larger gear

is the general part-or-system label rather than this small component
transmission system
vsgear
  • Specialized
2 3.7

A set of parts in a vehicle that send power from the engine to the wheels

is the basic machinery term that can mean vehicle power systems too
power train
vsgear
  • Specialized
1 5.1

Connected gears and parts that send power from a vehicle's engine or motor to its wheels

is the simpler part-or-system label for these power-transmitting parts
reduction gear
vsgear
  • Specialized
1 5.3

A group of gears that makes a fast shaft turn more slowly and gives more turning power to the output

is the general term for parts or systems not only for reduction
gear wheel
vsgear
  • Specialized
1 3.5

A round wheel with teeth that fits together with another wheel to move parts or change speed

is the broader name for the system using such toothed wheels
cogwheel
vsgear
  • Specialized
1 6.9

A round wheel with teeth that fit into another wheel to make it turn

is the general term for machines built from these toothed wheels
worm gear
vsgear
  • Specialized
1 6.1

A gear with a screw shaft that turns a toothed wheel to change direction and make turning slower and stronger

is the general term for the part or system beyond this pair
gear mechanism
vsgear
  • Specialized
1 4.1

A group of wheels with teeth that pass movement and force to make a machine work

is the basic part-or-system name for that mechanical unit
wheelwork
vsgear
  • Specialized
1 7.8

The wheels and gears inside a machine that make it move

is the general term for parts or systems that include those wheels and linkages
gearset
vsgear
  • Specialized
1 6.2

A set of gears that work together to change machine speed or power

is the general name for a single part or many working parts
gearwheel
vsgear
1 4.2

A round wheel with teeth that makes another wheel turn in a machine

is the general part or system built from such toothed wheels
bevel gear
vsgear
  • Specialized
1 6.5

A wheel with teeth set at an angle to change motion between two crossing shafts

is the wider part-or-system term not limited to angled wheels
geared wheel
vsgear
  • Specialized
1 6.3

A round wheel with teeth that fits another to change speed or direction

is the broader term for systems using rim teeth
differential gear
vsgear
  • Specialized
1 5.8

A set of gears that lets two wheels turn at different speeds when a car turns

is the broad part-or-system word covering such differential setups
geartrain
vsgear
  • Specialized
1 6.9

A group of wheels with teeth that pass on and change movement and force

is the single part or system that may include such interconnected sets
pinion and ring gear
vsgear
  • Specialized
1 8.0

Gears that fit together at a right angle to send power between car axles

is the broader part-or-system term that can include angled sets
epicyclic gear train
vsgear
  • Specialized
6.5

A set of gears where one gear moves around a central gear while spinning to change speed or force

is the wider part-or-system term not limited to this arrangement
epicyclic gear
vsgear
  • Specialized
8.8

A gear that turns around a central gear to change speed or turning force

is the broader part-or-system concept that can include this wheel type

Idioms

39 3.6

With the gears engaged so a car or machine can move when the engine runs

5 3.5

Completely ready and working at full speed

5 4.4

Working very fast and doing everything needed

4 9.9

To start working quickly and seriously

out of gear
  • Specialized
2 4.6

The gears are not engaged so the engine does not move the wheels

A person who has gear for an activity but does not know how to use it

9.9

Start working quickly and with more energy

Compounds

landing gear
  • Specialized
22 3.1

Wheels and parts under a plane that hold it on the ground during takeoff and landing

21 3.7

A forward setting in a vehicle that lets it go fastest with low engine speed

9 1.7

Equipment that people use to catch fish, like rods, nets, lines and hooks

5 2.5

A car setting used after first for low to medium speed and more power

4 1.6

Clothing and items like a raincoat or umbrella that keep you dry in rain

4 2.8

A gear in a car that makes the car move slowly when you start

3 3.2

A lower setting in a vehicle that gives more power and less speed for starting and climbing

1 3.4

A car setting that gives more speed than second but more power than higher gears

Clothing that keeps you dry and warm in rain or storms

top gear
  • Informal
1 3.8

A time when someone works at their highest speed or energy

reverse gear
  • Specialized
1 3.7

A gear in a vehicle that makes it move backwards

1 3.6

A handle in a car you move to change gears

1 3.2

Moving the gears in a car changes speed or power

steering gear
  • Specialized
1 4.0

A car part that moves the front wheels when the driver turns the wheel

reduction gear
  • Specialized
1 5.3

A group of gears that makes a fast shaft turn more slowly and gives more turning power to the output

gear wheel
  • Specialized
1 3.5

A round wheel with teeth that fits together with another wheel to move parts or change speed

1 5.0

A sudden change in plan or way of doing things to improve results

spur gear
  • Specialized
1 5.3

A wheel with straight teeth that turns another wheel on a parallel axle

sun gear
  • Specialized
1 6.0

A central gear that other gears turn around and that drives them

laughing gear
  • Archaic
1 9.9

A person's mouth and their ability to speak or make happy sounds

gear queer
  • Slang
1 9.9

A person who loves equipment for hobbies like cycling

planetary gear
  • Specialized
1 7.4

A gear that turns around a central sun gear to change speed in a gearbox

worm gear
  • Specialized
1 6.1

A gear with a screw shaft that turns a toothed wheel to change direction and make turning slower and stronger

1 2.6

Clothes and tools you need for long walks in hills or mountains

gear mechanism
  • Specialized
1 4.1

A group of wheels with teeth that pass movement and force to make a machine work

bevel gear
  • Specialized
1 6.5

A wheel with teeth set at an angle to change motion between two crossing shafts

gear case
  • Specialized
1 4.1

A metal cover that holds and protects gears in a machine or vehicle

planet gear
  • Specialized
1 7.7

A small wheel with teeth that turns around a central gear and fits inside an outer ring

differential gear
  • Specialized
1 5.8

A set of gears that lets two wheels turn at different speeds when a car turns

chafing gear
  • Jargon
1 8.5

Material like rope that protects a line or pole from rubbing

pinion and ring gear
  • Specialized
1 8.0

Gears that fit together at a right angle to send power between car axles

epicyclic gear
  • Specialized
8.8

A gear that turns around a central gear to change speed or turning force

epicyclic gear train
  • Specialized
6.5

A set of gears where one gear moves around a central gear while spinning to change speed or force

fixed-gear drivetrain
  • Specialized
7.0

A system that connects the pedals to the rear wheel so you must keep pedalling while the bike moves

Equipment for horses like saddles, bridles and harnesses

How Complex

transmission
  • Specialized
55 3.9
gearbox
  • UK
11 4.6
gear mechanism
  • Specialized
1 4.1
gear
142 2.9
cog
  • Specialized
7 5.6

Surface Forms

gear singular
gears plural

Etymology

Gear (the machine part) comes from an old word for a 'tool' or 'device' and was used for wheels with teeth that catch each other, like the gears on a bicycle. That is why gear names the toothed wheel that changes motion or speed in a machine.