Bộ phận kỹ thuật ngắt nước.

Bộ phận kỹ thuật means the technical department, technical section, or engineering team/unit.

Breakdown:

• bộ phận = department, section, unit, division
• kỹ thuật = technical, engineering, technology-related

So kỹ thuật describes what kind of bộ phận it is.

In Vietnamese, modifiers often come after the main noun.

So:

• bộ phận = department/unit
• bộ phận kỹ thuật = technical department

This is normal Vietnamese noun order. English usually does the opposite:

• English: technical department
• Vietnamese: department technical

The same pattern appears in many other phrases:

• phòng họp = meeting room
• xe buýt = bus
• nhân viên văn phòng = office staff

It follows the very common Vietnamese pattern:

Subject + Verb + Object

Here:

• Bộ phận kỹ thuật = subject
• ngắt = verb
• nước = object

So the sentence structure is straightforward:

• The technical department
  • shuts off/cuts off
    • water

Here, ngắt means something like:

• to disconnect
• to interrupt
• to shut off
• to cut off

With utilities such as water or electricity, ngắt suggests stopping the supply.

So ngắt nước means to shut off the water supply.

These are similar, but not exactly the same:

• ngắt nước: to interrupt/shut off the water; sounds somewhat technical or administrative
• cắt nước: to cut off the water; very common and often used in notices
• khóa nước: to close the water valve; emphasizes the physical act of turning the valve off
• cúp nước: water outage / the water is off; more colloquial in many contexts

So ngắt nước is understandable and natural, especially in a technical or building-management context.

Because Vietnamese verbs often already contain that meaning.

In English, turn off has two parts. In Vietnamese, ngắt already includes the idea of stopping or disconnecting something, so no extra word like off is needed.

So:

• English: turn off the water
• Vietnamese: ngắt nước

Vietnamese often leaves tense unmarked when the context is clear.

So Bộ phận kỹ thuật ngắt nước could mean different things depending on the situation:

• cut the water
• is cutting off the water
• will cut off the water

If the speaker wants to be more specific, they can add a time marker:

• đã ngắt nước = already cut off the water
• đang ngắt nước = is cutting off the water
• sẽ ngắt nước = will cut off the water

This is very normal in Vietnamese.

Vietnamese does not use articles like a, an, and the the way English does.

So bộ phận kỹ thuật can mean:

• the technical department
• a technical department

And nước can mean:

• the water
• water

Context decides which one is meant. In a real situation, people usually already know which department and which water supply are being talked about.

Yes. Nước can also mean country or nation in other contexts.

For example:

• nước Việt Nam = the country of Vietnam
• uống nước = drink water

But in ngắt nước, the meaning is clearly water, because ngắt naturally goes with utilities or supply systems.

It is grammatically a complete sentence, but it sounds brief and notice-like.

You might see this kind of wording in:

• building announcements
• maintenance messages
• internal reports
• short notifications

In fuller everyday speech, people might say:

• Bộ phận kỹ thuật sẽ ngắt nước.
• Bên kỹ thuật đang ngắt nước.
• Bộ phận kỹ thuật đã ngắt nước rồi.

So the original sentence is correct, but it has a clipped, practical style.

It refers to the department or unit as a whole, not necessarily a single person.

Vietnamese often names the organization or department responsible for an action, even if only one employee actually does it.

So this is similar to English sentences like:

• The technical department shut off the water.
• Management approved it.

The focus is on who is responsible, not on the individual worker.