Undertøyet er hjemme.

Because -et marks the definite form of a neuter noun in Norwegian.

• et undertøy = an underwear garment / underwear
• undertøyet = the underwear

Unlike English, Norwegian usually adds the definite article to the end of the noun instead of putting a separate word like the in front.

Undertøy is a neuter noun, so it takes:

• et undertøy in the indefinite singular
• undertøyet in the definite singular

That is why the ending is -et.

It is singular in form, but it often works like a collective noun, much like English underwear.

So even though English underwear does not usually feel like a normal singular count noun, Norwegian undertøy can be treated as a singular noun:

• Undertøyet er hjemme. = The underwear is at home.

If you want to talk about separate items, you would often use more specific words, such as:

• truser = panties/briefs
• bokser = boxers
• BH = bra
• underbukser = underpants

Because Norwegian basic word order in a simple statement is:

subject + verb + other information

So:

• Undertøyet = subject
• er = verb
• hjemme = location/state

This is the normal pattern for a basic declarative sentence.

Hjemme means at home and is used for location.

• hjemme = at home
• hjem = home, often used with movement/direction

Compare:

• Undertøyet er hjemme. = The underwear is at home.
• Jeg drar hjem. = I’m going home.

A useful shortcut:

• Where is it? → often hjemme
• Where is it going? → often hjem

Yes. Hjemme can be used for objects too, meaning they are at home or back where they belong.

Examples:

• Nøklene er hjemme. = The keys are at home.
• Telefonen er hjemme. = The phone is at home.

So Undertøyet er hjemme is grammatically normal, even if the context may sound a little specific or unusual.

No. That would not work here.

• hjemme is an adverb meaning at home
• hjemmet is the definite form of the noun hjem and means the home

So:

• Undertøyet er hjemme. = The underwear is at home.
• Hjemmet er stort. = The home is big.

You could, but it usually sounds less natural in everyday speech.

• hjemme is the normal, idiomatic way to say at home
• i hjemmet literally means in the home, which sounds more formal, more literal, or more specific

So in ordinary conversation, Undertøyet er hjemme is the more natural choice.

Because in Norwegian, definiteness is usually built into the noun itself with an ending.

So instead of:

• the underwear

Norwegian says:

• undertøyet

This is one of the biggest differences from English noun structure.

A simple learner-friendly pronunciation guide would be:

UN-der-toy-et er YEM-meh

A few notes:

• ø in tøy does not exist in standard English; it is a rounded vowel.
• øy is a diphthong.
• hjemme starts with a hj- sound that many learners simplify at first.

You do not need perfect pronunciation right away; the key thing is recognizing the parts:

• under-
• tøy
• -et
• er
• hjemme

Yes. It is a full, correct sentence.

It has everything it needs:

• Undertøyet = subject
• er = verb
• hjemme = complement/adverbial

Norwegian often allows very short sentences like this, just as English does:

• The underwear is at home.
• Undertøyet er hjemme.