Desmunta la roda.

Here desmunta is the informal singular imperative of desmuntar, used when telling one person what to do.

So the full idea is:

• (Tu) desmunta la roda. = command to one person

A useful detail: this same form can also match the 3rd person singular present (he/she dismantles, you formal dismantle), but in a short standalone sentence like this, it is naturally understood as a command.

The infinitive is desmuntar.

To form the tu imperative for most regular -ar verbs, Catalan usually uses the same form as the 3rd person singular present indicative:

• desmuntar → desmunta
• parlar → parla
• tancar → tanca

So:

• desmunta = take apart / remove / dismantle!

Catalan often omits subject pronouns when they are understood from the verb form. This is very common.

So instead of saying:

• Tu desmunta la roda

Catalan normally just says:

• Desmunta la roda

The verb already tells you this is addressed to tu in command form, so tu is unnecessary unless you want emphasis.

Catalan uses the definite article very regularly, often more than English does.

So:

• la roda = the wheel

In a command like this, Catalan normally wants the article with a specific noun:

• Desmunta la roda.

Using just roda here would generally sound incomplete or unnatural.

It can cover several related ideas, depending on context.

Desmuntar often means:

• to dismantle
• to take apart
• to disassemble
• to remove something from where it is attached

So in Desmunta la roda, the exact English wording could vary by situation:

• remove the wheel
• take off the wheel
• dismantle the wheel

If the meaning has already been given to the learner, the important thing is that desmuntar usually suggests taking something apart or off, not just moving it in a general way.

In Catalan, negative commands do not use the same form as the positive imperative. They use the present subjunctive.

So:

• Desmunta la roda. = Take off the wheel.
• No desmuntis la roda. = Don’t take off the wheel.

This is a very important pattern:

• positive command to tu: desmunta
• negative command to tu: no desmuntis

You would use the direct object pronoun la.

With an affirmative imperative, object pronouns attach to the end of the verb:

• Desmunta-la. = Take it off. / Dismantle it.

With a negative command, the pronoun goes before the verb:

• No la desmuntis. = Don’t take it off.

This contrast is very common in Catalan:

• affirmative command: verb + pronoun
• negative command: pronoun + verb

Catalan changes the command form depending on who you are addressing.

• Desmunta la roda. = informal, one person (tu)
• Desmunti la roda. = formal, one person (vostè)
• Desmunteu la roda. = informal, more than one person (vosaltres)
• Desmuntin la roda. = formal, more than one person (vostès)

So the form in your sentence is specifically the informal singular command.

The normal order is:

• verb + object

So:

• Desmunta = command verb
• la roda = direct object

This is exactly what you would expect in a simple command in Catalan.

You could add other elements after it if needed, for example:

• Desmunta la roda ara. = Take off the wheel now.
• Desmunta la roda amb cura. = Take off the wheel carefully.

A simple learner-friendly pronunciation is:

• dez-MOON-ta la RO-da

A few helpful notes:

• desmunta has the stress on mun
• roda has the stress on ro
• the r in roda is a tapped Catalan/Spanish-style r, not an English r
• the final a in many Catalan varieties is reduced, especially in Central Catalan

A more Central Catalan-style pronunciation is roughly:

• dəz-MUN-tə lə RO-də

But for a beginner, a clear dez-MOON-ta la RO-da is a good start.

Usually roda means wheel. In everyday usage, though, people sometimes use wheel-related words a bit loosely depending on context.

If you want to be more precise:

• roda = wheel
• pneumàtic = tyre

So in many learning contexts, la roda is best understood as the wheel, unless the situation suggests a broader everyday meaning.