El quitamanchas puede dañar la prenda delicada.

Because it functions as a noun: quitamanchas = stain remover.

It comes from:

• quita = removes / take away
• manchas = stains

Spanish often creates compound nouns this way, and they are commonly written as a single word. Other similar examples are:

• parabrisas = windscreen / windshield
• sacacorchos = corkscrew

So here, el quitamanchas means the stain remover.

Yes, it is treated as a masculine noun in this sentence, so it takes el.

With compound nouns like quitamanchas, grammatical gender is something you usually just learn together with the word. In practice, you will commonly hear:

• el quitamanchas
• un quitamanchas

So when learning the noun, it is best to memorise it with its article: el quitamanchas.

Spanish often uses the definite article more broadly than English does, especially when talking about things in a general or typical way.

So:

• El quitamanchas puede dañar la prenda delicada
  can mean something like
• Stain remover can damage delicate clothing / a delicate garment

Even though English might prefer a more general form without the, Spanish commonly uses el / la for this kind of statement.

Puede is the él / ella / usted form of poder, meaning can / may / is able to.

So:

• puede dañar = can damage

This is a very common structure in Spanish:

• puede + infinitive
• no puede + infinitive

Examples:

• Puede ser peligroso = It can be dangerous
• No puede entrar = He/She/You cannot enter

Because after puede, Spanish uses an infinitive.

So:

• puede dañar = can damage

Compare:

• El quitamanchas daña la tela = The stain remover damages the fabric
• El quitamanchas puede dañar la tela = The stain remover can damage the fabric

After modal verbs like poder, you normally use the infinitive:

• puede causar
• puede romper
• puede dañar

Yes, it could be plural. The singular here is just referring to a delicate garment or delicate clothing in a general sense.

Singular:

• la prenda delicada = the delicate garment

Plural:

• las prendas delicadas = delicate garments

Spanish often uses the singular to talk about a type or category in a general way. If you wanted to make it more obviously plural, you could say:

• El quitamanchas puede dañar las prendas delicadas

In Spanish, most adjectives normally come after the noun.

So:

• prenda delicada = delicate garment

This is the standard order:

• casa grande = big house
• vino tinto = red wine
• ropa limpia = clean clothes

Putting the adjective before the noun is sometimes possible, but it often changes the tone or emphasis. Here, prenda delicada is the natural, neutral order.

Because adjectives in Spanish agree with the noun they describe.

Prenda is a feminine singular noun, so the adjective must also be feminine singular:

• prenda delicada

Compare:

• tejido delicado = delicate fabric
• prenda delicada = delicate garment
• prendas delicadas = delicate garments

This agreement is very important in Spanish.

Its basic meaning is garment or item of clothing. It often refers to a single piece of clothing.

So:

• una prenda = a garment / an item of clothing

In washing or care instructions, prenda is very common because it sounds precise and practical.

Depending on context, English may translate it more naturally as:

• garment
• item of clothing
• clothing

For example, this sentence could sound natural in English as:

• The stain remover can damage delicate clothing even though Spanish uses singular la prenda delicada.

A simple pronunciation guide is:

• qui-ta-MAN-chas

Notes:

• qui sounds roughly like kee
• ch is like English ch in chair
• the stress falls on man: quitamanchas

Also, remember that qu before i or e usually sounds like a hard k:

• quita sounds like KEE-ta

So the whole word is approximately:

• kee-ta-MAN-chas

Yes. Both are possible, but they are structured differently.

With dañar:

• El quitamanchas puede dañar la prenda delicada

With hacer daño a:

• El quitamanchas puede hacer daño a la prenda delicada

Both mean that the stain remover can harm the delicate garment.
However, dañar is more compact and often sounds more natural in warnings, labels, or instructions.

Yes, absolutely. It sounds natural for warnings or cleaning instructions.

Spanish labels often use wording like:

• Puede dañar tejidos delicados
• No usar en prendas delicadas
• Puede dañar la prenda

Your sentence is grammatically correct and sounds like a general warning: the stain remover may harm delicate clothing.