Gearet på cyklen virker ikke ordentligt.

Because gearet is the definite singular form of gear.

• et gear = a gear
• gearet = the gear

In this sentence, Danish is talking about the gear / the gearing on the bike, not just any gear in general.

A similar pattern:

• et hus → huset
• et hjul → hjulet

So gearet på cyklen literally means the gear on the bike.

Cyklen is the definite singular form of cykel.

• en cykel = a bike
• cyklen = the bike

So:

• på en cykel = on a bike
• på cyklen = on the bike

In the sentence, it refers to a specific bike, so Danish uses cyklen.

That is a basic feature of Danish grammar. Danish usually expresses the by adding an ending to the noun.

Examples:

• en bil = a car
• bilen = the car
• et gear = a gear
• gearet = the gear

So instead of a separate word like English the, Danish often uses:

• -en with many en-words
• -et with many et-words

That is why you see cyklen and gearet.

Here på means on.

• gearet på cyklen = the gear on the bike

This is the natural Danish way to say that something belongs to or is located on the bike.

Compare:

• tasken på stolen = the bag on the chair
• hjulet på bilen = the wheel on the car

You would not normally use af here, because af often means of/from, and that would sound unnatural in this sentence.

Virker comes from virke, which often means to work, to function, or to seem.

In this sentence:

• Gearet ... virker ikke ordentligt = The gear isn’t working properly

If you used er, that would mean is, which would describe a state rather than functioning.

Compare:

• Motoren virker ikke = The engine doesn’t work
• Motoren er gammel = The engine is old

So virker is the right verb when talking about whether something functions correctly.

In a normal main clause, Danish usually places ikke after the finite verb.

So:

• Gearet virker ikke ordentligt

Pattern:

• subject + verb + ikke + other information

More examples:

• Han kommer ikke i dag. = He isn’t coming today.
• Bilen starter ikke. = The car won’t start.

This word order is very common in Danish main clauses.

Here ordentligt means properly or correctly.

So:

• virker ikke ordentligt = doesn’t work properly

The base form is ordentlig, which can mean proper, decent, or tidy depending on context.

Examples:

• et ordentligt måltid = a proper meal
• Vær ordentlig! = Behave properly!
• Det virker ikke ordentligt. = It doesn’t work properly.

In this sentence, ordentligt is being used as an adverb.

Because when Danish uses an adjective as an adverb, it often takes -t.

So:

• ordentlig = proper
• ordentligt = properly

Compare:

• hurtig = fast
• hurtigt = quickly / fast
• dårlig = bad
• dårligt = badly

That is why virker ikke ordentligt means doesn’t work properly.

In this sentence, gearet most naturally refers to the gearing / the gear mechanism / the gear system on the bike, not necessarily just one single gear wheel.

Danish often uses gear in a practical, everyday way when talking about bicycles, cars, and shifting.

Depending on context:

• et gear can mean a gear
• gearet can also mean the gearing / the gear mechanism

So even though the form is singular, the meaning can be broader than just one physical part.

Yes, but that changes the meaning slightly.

• Gearet på cyklen virker ikke ordentligt
  = The bike’s gear system isn’t working properly

• Gearene på cyklen virker ikke ordentligt
  = The gears on the bike aren’t working properly

Gearene is the definite plural:

• gear = gears
• gearene = the gears

The singular version often sounds more like the whole mechanism; the plural version focuses more on the individual gears.

It is typically pronounced something like GEE-ahd or GEE-uhd, with a soft Danish r and a weak final -t.

A few helpful points:

• gear in Danish sounds close to giar for many learners
• the r is not like a strong English r
• the final -et in speech is often less clearly pronounced than English speakers expect

A rough learner-friendly approximation:

• gearet ≈ GEE-ah-d

Pronunciation varies a bit by accent, but the important thing is not to pronounce it too much like English gear-it.

Yes, that is the literal structure:

• Gearet = the gear
• på cyklen = on the bike
• virker = works
• ikke = not
• ordentligt = properly

So literally:

• The gear on the bike works not properly

But natural English would be:

• The gear on the bike doesn’t work properly or
• The bike’s gears aren’t working properly

Yes, that is possible, but it can sound a little different in focus.

• Gearet på cyklen virker ikke ordentligt
  naturally groups the gear on the bike as the subject.

• Gearet virker ikke ordentligt på cyklen
  can sound as if on the bike is being added later, almost like clarifying where it does not work properly.

The original sentence is the more natural choice if you want to identify the bike’s gear right from the start.

Yes. It is a very useful pattern:

[definite noun] + [prepositional phrase] + [verb] + ikke + [adverb]

For example:

• Motoren i bilen virker ikke ordentligt.
• Låsen på døren virker ikke længere.
• Lyset i køkkenet virker ikke.

This pattern is common when talking about things that are broken or not functioning well.