Naghihilamos si Ana dahil mainit ang mukha niya at pagod ang mata niya.

Naghihilamos means is washing her face or, in some contexts, washes her face.

The base word is hilamos, which refers specifically to washing or rinsing the face. So this is not a general word for washing the body or doing laundry; it is about the face.

In this sentence, Naghihilamos si Ana means that Ana is doing that action.

That is how Filipino commonly builds verb forms.

• hilamos = face wash / wash the face
• nag- = a common actor-focus verb prefix
• repeated hi = part of the imperfective form

So:

• naghilamos = washed her face
• naghihilamos = is washing / washes her face

The repeated syllable often signals an ongoing or incomplete action.

Not exactly in the same way English works.

Filipino verbs usually mark aspect more than tense. Naghihilamos is imperfective, which often means:

• an action happening now: is washing her face
• a habitual action: washes her face

In this sentence, it most naturally sounds like is washing her face because it is followed by a reason.

Si is the marker used for a singular personal name when that name is in the topic position.

So:

• si Ana
• si Marco
• si Liza

But for common nouns, Filipino uses ang:

• ang babae
• ang doktor
• ang bata

Here, Ana is the topic/doer of the actor-focus verb, so si Ana is the correct form.

Yes, dahil and kasi can both mean because.

In this sentence:

• dahil = because

So Naghihilamos si Ana dahil... means Ana is washing her face because...

A more conversational version could use kasi:

• Naghihilamos si Ana kasi mainit ang mukha niya at pagod ang mata niya.

The difference is mostly tone:

• dahil sounds a bit more neutral or formal
• kasi sounds more casual and conversational

Filipino often does not use a separate present-tense copula like English is/are.

So:

• mainit ang mukha niya = her face is hot
• pagod ang mata niya = her eye/eyes are tired

This is completely normal. Filipino can make a full sentence with:

• a predicate first, such as an adjective
• then the topic marked by ang

So you do not need a separate word meaning is there.

Because Filipino often uses predicate-first word order.

That means the describing word can come first:

• mainit ang mukha niya
• pagod ang mata niya

Literally, the structure is closer to:

• hot her face
• tired her eye/eyes

But in natural English, we translate them as:

• her face is hot
• her eyes are tired

This predicate-first pattern is very common in Filipino.

Here, ang marks the topic of each descriptive clause.

In:

• mainit ang mukha niya

the predicate is mainit, and the thing being described is ang mukha niya.

In:

• pagod ang mata niya

the predicate is pagod, and the thing being described is ang mata niya.

So ang here is not just the same as English the. It is a very important grammatical marker showing what the predicate is about.

Niya means his, her, or sometimes its, depending on context.

In this sentence, because we already know the person is Ana, niya means her:

• mukha niya = her face
• mata niya = her eye / her eyes

Filipino possessive forms commonly come after the noun:

• bahay niya = his/her house
• kaibigan niya = his/her friend
• mukha niya = his/her face

Also, Filipino pronouns usually do not show gender, so niya can mean either his or her.

Good question. Filipino does not always mark plural as strictly as English does.

• mata niya can be understood from context
• mga mata niya makes the plural more explicit

So if you want to clearly say her eyes, many speakers would also say:

• pagod ang mga mata niya

The version with mata niya is still understandable, but mga mata niya is more explicit if you want to emphasize both eyes.

At means and.

It joins the two reasons:

• mainit ang mukha niya
• pagod ang mata niya

So the full reason is:

• her face is hot and her eye/eyes are tired

That whole reason clause explains why Ana is washing her face.