doroyoke wo tukeru.

It is usually read どろよけ.

• 泥 = どろ (mud)
• よけ = guard / protection / something that prevents

So 泥よけ means something like mudguard, splash guard, or mud flap, depending on the object.

It refers to a part or accessory that prevents mud or water from splashing.

Depending on context, it could mean:

• a bike fender
• a car mud flap
• a splash guard
• some other protective cover that keeps mud off

So the exact English translation can change depending on what is being worked on.

This is very common in Japanese.

The よけ part is related to the idea of avoiding / preventing, and it can historically connect to the verb 避ける (さける, to avoid). But in compounds like 泥よけ, it is very often written in hiragana rather than as full kanji.

So 泥よけ is a normal and natural spelling. Japanese often mixes kanji and hiragana this way, especially in everyday words and set compounds.

を marks the direct object of the verb.

In 泥よけ を 付ける, the thing being attached is 泥よけ.

So structurally, it is:

• 泥よけ = mudguard
• を = object marker
• 付ける = to attach / put on

So the sentence literally means attach a mudguard or put on the mudguard.

Here, 付ける means to attach, to put on, or to install.

It is a very common verb with a broad range of meanings, including:

• attaching something
• adding something
• turning something on
• applying something

In this sentence, the meaning is specifically to attach/install.

Because 付ける is one of the most natural Japanese verbs for putting something onto another thing so that it becomes attached.

For example:

• 部品を付ける = attach a part
• 名札を付ける = attach a name tag
• カバーを付ける = put on a cover

So with 泥よけ, 付ける is a very natural choice.

A more technical or formal alternative might be 取り付ける, which means to install / mount, but 付ける is simpler and very common.

Yes. 付ける is transitive, which means it takes a direct object.

That is why it uses を:

• 泥よけを付ける = attach the mudguard

Its intransitive counterpart is 付く:

• 泥よけが付く = the mudguard gets attached / is attached / comes with a mudguard

This transitive–intransitive pair is very common in Japanese:

• 付ける = to attach something
• 付く = to be attached

The dictionary form is often used in short labels, instructions, manuals, notes, and action lists.

So 泥よけを付ける。 can sound like:

• a step in instructions
• a memo
• a task description
• a heading for an action

It is not necessarily a full conversational sentence. In a manual, it might mean something like:

• Attach the mudguard.
• Install the mudguard.

So even though it is dictionary form, the practical meaning may feel imperative in context.

Yes. Japanese often omits information that is understood from context.

This sentence does not say:

• who attaches it
• what it is being attached to
• when it is being attached

Those details are simply left out because they are probably obvious from the situation.

For example, in a repair manual, everyone already knows:

• the worker is doing it
• the mudguard is being attached to the bike/car/etc.
• it happens at this step

So the short sentence is perfectly natural.

Yes. Both can work.

• attach the mudguard sounds a bit more literal and mechanical
• put on the mudguard sounds a bit more natural in everyday English
• install the mudguard can work in technical contexts

The best translation depends on the context.

Yes, there is a small nuance difference.

• 付ける = attach / put on
  
  • broader, simpler, very common
• 取り付ける = install / mount / fasten onto
  
  • more specific and often more mechanical or technical

So:

• 泥よけを付ける = attach/put on a mudguard
• 泥よけを取り付ける = install/mount a mudguard

In many practical situations, both could be used, but 取り付ける sounds a bit more like a deliberate installation process.

Yes. Japanese has several verbs pronounced つける, and the kanji can change depending on meaning.

For example:

• 付ける = attach, add
• 着ける = put on (accessories, clothing items in some cases)
• 点ける = turn on a light or fire

In this sentence, 付ける is the correct kanji because the meaning is attach/install.

A polite version would be:

泥よけを付けます。

If it were an instruction, you might also see:

泥よけを付けてください。
Please attach the mudguard.

So the original sentence is neutral and plain, while these versions are more polite or directly instructional.