Ingatan mo ang kamay mo kapag gumagamit ka ng kutsilyo sa kusina.

Ingat by itself is a noun/adjective-like word related to care or caution.
Ingatan is a verb form meaning take care of, protect, or be careful with something.

So in this sentence, Ingatan mo ang kamay mo means Take care of your hand(s) or Protect your hand(s).

A useful comparison:

• Mag-ingat ka. = Be careful.
• Ingatan mo ang kamay mo. = Be careful with / protect your hand(s).

So mag-ingat is more general, while ingatan points to a specific thing that should be protected.

That mo means you, but in a form used for the doer of this kind of verb.

In Filipino, pronouns change form depending on their role in the sentence. With Ingatan, the doer is marked by mo, not ka.

So:

• Ingatan mo ... = You should take care of ...

This is very common with command forms like:

• Buksan mo ang pinto. = Open the door.
• Isara mo ang bintana. = Close the window.
• Ingatan mo ang kamay mo. = Take care of your hand(s).

Ang marks the noun phrase that is the main target or focus of the verb here.

In Ingatan mo ang kamay mo, the thing being protected is ang kamay mo = your hand / your hands.

So the structure is roughly:

• Ingatan = protect / take care of
• mo = you
• ang kamay mo = your hand(s)

That is why kamay mo takes ang here.

The two mo words have different jobs:

• The first mo = you as the doer of the command
• The second mo = your, showing possession

So:

• Ingatan mo = You should take care of
• ang kamay mo = your hand(s)

Even though both are spelled mo, their roles are different.

Because Filipino uses different pronoun forms depending on grammar.

In this sentence:

• Ingatan mo ... uses mo
• kapag gumagamit ka ... uses ka

Why?

• Ingatan is a form that takes the doer as mo
• gumagamit is an actor-focused verb, so the subject/doer is ka

So both mean you, but they appear in different grammatical environments.

This is very normal in Filipino.

Kapag means when or whenever.

In this sentence:

• kapag gumagamit ka ng kutsilyo sa kusina
  = when/whenever you use a knife in the kitchen

It introduces the situation in which the advice applies.

A quick comparison:

• kapag = when / whenever
• kung = usually if

In everyday speech, people also often shorten kapag to pag.

Gumagamit comes from the root gamit, which is related to use.

This verb is built with -um- and reduplication:

• root: gamit
• completed/perfective: gumamit = used
• imperfective: gumagamit = is using / uses
• contemplated: gagamit = will use

So gumagamit ka means:

• you are using
• or you use, depending on context

In this sentence, after kapag, it naturally means when you are using or when you use.

Filipino often puts the verb first. That is one of the most common sentence patterns.

So:

• gumagamit ka = you are using

rather than a structure like English you are using.

Also, short pronouns like ka often come right after the first main word of the clause. So gumagamit ka is the natural order here.

Here, ng marks the thing being used: kutsilyo (knife).

So:

• gumagamit ka ng kutsilyo = you are using a knife

This ng is not exactly the same as English of. It has several functions in Filipino, and one common use is marking a non-ang object.

In this sentence, it tells you what is being used.

Sa is used for locations, directions, and places. Here it means in.

So:

• sa kusina = in the kitchen

This is straightforward location marking:

• sa bahay = at home / in the house
• sa paaralan = at school
• sa kusina = in the kitchen

Literally, kamay is hand. But in real usage, it can sometimes sound more general, especially in warnings like this.

So Ingatan mo ang kamay mo can be understood as:

• Protect your hand
• or more naturally in English, Protect your hands

If you wanted to make the plural very explicit, you could say:

• ang mga kamay mo = your hands

But the original sentence is natural as it is.

It is basically a command/advice, and it also carries the feeling of a warning.

Ingatan mo ang kamay mo sounds like:

• Take care of your hand(s).
• Be careful with your hand(s).
• Protect your hand(s).

Because of the second part, kapag gumagamit ka ng kutsilyo sa kusina, the whole sentence feels like practical safety advice.

Yes, it is natural and easy to understand.

It sounds like something a parent, teacher, or older person might say to remind someone to be careful while handling a knife.

A very common alternative would be:

• Mag-ingat ka kapag gumagamit ka ng kutsilyo sa kusina.
  = Be careful when using a knife in the kitchen.

The original sentence is a bit more specific because it focuses on protecting your hand(s).

To make it more polite or plural, you would change the pronouns.

For more than one person, or for polite you:

• Ingatan ninyo ang kamay ninyo kapag gumagamit kayo ng kutsilyo sa kusina.

If you want extra politeness, especially when speaking respectfully:

• Ingatan po ninyo ang kamay ninyo kapag gumagamit po kayo ng kutsilyo sa kusina.

So the original sentence uses mo and ka, which are for singular you in a normal, non-formal setting.