Setelah mati rasa hilang, saya berkumur dengan obat kumur.

Setelah means after. It introduces a time clause: after the numbness disappears.

Putting it at the beginning is very natural in Indonesian when you want to set the time first. The sentence structure is:

Setelah mati rasa hilang, saya berkumur dengan obat kumur.
= After the numbness went away, I rinsed/gargled with mouthwash.

You could also put the main clause first in some contexts, but starting with setelah... is very common.

Yes, literally mati rasa is made up of:

• mati = dead
• rasa = feeling, sensation

Together, mati rasa means numb, numbness, or loss of sensation. This is a fixed expression in Indonesian, so learners should treat it as one unit.

Depending on context, it can describe:

• a numb body part
• emotional numbness
• a general lack of sensation

In this sentence, it refers to physical numbness.

Hilang means disappear, go away, or be gone.

So mati rasa hilang literally means the numbness disappears or the numbness is gone.

This is a very natural way to express the end of a condition in Indonesian. Indonesian often uses simple verbs like hilang where English might prefer something like wear off.

So:

• mati rasa hilang = the numbness goes away
• very natural English translation: the numbness wore off

Indonesian often does not need a verb equivalent to is/are in the same way English does.

In English, you might say:

• the numbness is gone

In Indonesian, you can simply say:

• mati rasa hilang

This is normal. Indonesian frequently leaves out a copula where English requires one.

So the phrase works naturally without any extra word meaning is.

Kumur is the base/root, but berkumur is the normal verb form meaning to rinse the mouth or to gargle.

The prefix ber- often forms intransitive verbs or verbs describing an activity someone does. So:

• kumur = the root related to rinsing/gargling
• berkumur = to rinse one’s mouth / to gargle

In everyday Indonesian, berkumur is the standard form you are most likely to see.

In many cases, ber- creates a verb meaning to do X, to have X, or to engage in X.

In berkumur, it turns the root into an activity:

• berkumur = to do the action of mouth-rinsing/gargling

You do not need to translate ber- with a single English word every time. It is better to learn the full verb as a unit.

Other common examples:

• berjalan = to walk
• berenang = to swim
• berbicara = to speak

So here, berkumur is simply the normal verb form.

It can cover both ideas, depending on context.

In this sentence, because it is followed by dengan obat kumur, the meaning is most naturally rinse my mouth with mouthwash. In some contexts, English speakers might also say gargle with mouthwash, but rinse is often the safer translation here.

So berkumur is a little broader than a single English verb.

Dengan means with.

Here it introduces the thing used for the action:

• berkumur dengan obat kumur
• rinse/gargle with mouthwash

So dengan marks the instrument or substance being used.

This is very straightforward:

• menulis dengan pena = write with a pen
• memotong dengan pisau = cut with a knife
• berkumur dengan obat kumur = rinse/gargle with mouthwash

Literally:

• obat = medicine, remedy
• kumur = rinse/gargle

So obat kumur literally means something like gargling medicine or mouth-rinsing medicine, but the natural English meaning is mouthwash.

This is a common Indonesian way of naming things: a noun plus a describing word or function.

So even if the literal meaning sounds unusual in English, obat kumur is just the normal term for mouthwash.

Because both expressions are built from the same root idea.

• berkumur = to rinse the mouth / to gargle
• obat kumur = mouthwash, the liquid used for that action

This is very common in Indonesian. A root can appear in both:

• a verb
• a related noun phrase

That makes the sentence very transparent once you know the root.

Not always, but it is perfectly natural to include it.

Indonesian often allows the subject to be omitted if it is already clear from context. So in a conversation, someone might say:

• Setelah mati rasa hilang, berkumur dengan obat kumur.

That could sound like an instruction: After the numbness is gone, rinse with mouthwash.

But if the speaker is talking about their own action, using saya makes it explicit:

• Setelah mati rasa hilang, saya berkumur dengan obat kumur.

So saya is used here to clearly say I.

It sounds neutral to slightly formal, mostly because of saya.

• saya is polite and standard
• berkumur
• obat kumur
• setelah

All of these are normal standard Indonesian.

In more casual speech, someone might use aku instead of saya:

• Setelah mati rasa hilang, aku berkumur dengan obat kumur.

Both are correct, but saya is more formal/polite.

As written, it is a statement because of saya:

• I rinsed/gargled with mouthwash

If you remove saya, it can sound more like an instruction or general recommendation:

• Setelah mati rasa hilang, berkumur dengan obat kumur.
• After the numbness is gone, rinse with mouthwash.

So the presence of saya is important for making it clearly a personal statement rather than advice or an instruction.