Odpadní hadice je pod pračkou.

Odpadní is an adjective meaning waste, drain, or for wastewater in this context.

So odpadní hadice means a drain hose or waste hose.
It comes from odpad, which can mean waste or drainage depending on context.

A very common pattern in Czech is:

• adjective + noun
• odpadní hadice = drain hose
• pračka = washing machine

So this is just a normal noun phrase with an adjective in front.

Yes. Hadice is the dictionary form, also called the nominative singular.

In this sentence, hadice is the subject, so Czech uses the nominative:

• Odpadní hadice = the drain hose
• je = is
• pod pračkou = under the washing machine

So hadice stays in its basic form because it is the thing being described.

Hadice is a feminine noun. You usually learn grammatical gender together with the noun.

Here are some clues:

• many feminine nouns end in -a, but not all do
• some feminine nouns end in -e or a consonant
• hadice is one of those feminine nouns ending in -e

You can also see it from agreement:

• odpadní hadice

In this particular phrase, odpadní looks the same for several genders in the singular, so the adjective itself does not clearly show the gender here. But the noun hadice is feminine, and that matters for declension in other forms.

In standard Czech, you normally keep je in this kind of sentence.

• Odpadní hadice je pod pračkou.
• literally: The drain hose is under the washing machine.

Unlike Russian, Czech usually does not omit the present tense of to be in normal statements like this.

So je is the normal and correct form here.

Because pod can take different cases depending on the meaning.

Here it expresses location:

• under the washing machine
• no movement, just position

With pod meaning location, Czech uses the instrumental case.

So:

• pračka = washing machine
• pod pračkou = under the washing machine

If there were movement to a position under something, Czech would usually use the accusative:

• Dám hadici pod pračku. = I’ll put the hose under the washing machine.

So the difference is:

• pod + instrumental = location
• pod + accusative = movement toward a position under something

The base form is pračka.

Here is the pattern:

• pračka = nominative singular
• pračkou = instrumental singular

That -ou ending is very common for feminine nouns in -a in the instrumental singular.

For example:

• žena → ženou
• taška → taškou
• pračka → pračkou

So pod pračkou is a very regular form.

That is simply how Czech grammar works with some prepositions. Certain prepositions change case depending on whether they describe:

• location
• direction/movement

With pod:

• pod stolem = under the table → location → instrumental
• pod stůl = to under the table → movement → accusative

The same logic appears with some other prepositions too, such as nad, před, and za.

So in your sentence, the hose is already there, so Czech chooses the instrumental.

Yes. Czech word order is more flexible than English word order.

The neutral version is:

• Odpadní hadice je pod pračkou.

But you could also say:

• Pod pračkou je odpadní hadice.

Both are grammatical. The difference is mainly in focus or emphasis.

Very roughly:

• Odpadní hadice je pod pračkou.
  Focuses first on the hose
• Pod pračkou je odpadní hadice.
  Focuses first on the location

English usually depends more on fixed word order; Czech can move things around more freely.

Because that is the normal position in Czech for most descriptive adjectives.

So:

• odpadní hadice = drain hose
• nová pračka = new washing machine
• velká taška = big bag

Putting the adjective after the noun is unusual in ordinary speech and usually sounds literary, special, or part of a fixed expression.

So odpadní hadice is the expected standard order.

Approximate pronunciation:

• pračkou ≈ prach-koh with a final sound like oh, but as one diphthong ou
• more carefully: PRACH-koh / PRACH-kou

A few tips:

• č sounds like ch in church
• ou in Czech is a diphthong, somewhat like oh-oo said quickly together
• stress in Czech usually falls on the first syllable of the word

So:

• OD-pad-ní
• HA-di-ce
• je
• pod
• PRAČ-kou

Yes. Pračka is the standard everyday Czech word for a washing machine.

It comes from the verb prát, meaning to wash laundry.

So learners often notice this family:

• prát = to wash clothes/laundry
• pračka = washing machine

This is a very common and useful household word.

Yes. Czech has no articles like the or a/an.

So Czech simply says:

• Odpadní hadice je pod pračkou.

Whether English would translate it as the drain hose or a drain hose depends on context.

That is normal in Czech. Definiteness is usually understood from the situation rather than marked with a separate word.

It is in the nominative singular.

Why?

Because it is the subject of the sentence:

• Odpadní hadice = the thing being talked about
• je = is
• pod pračkou = under the washing machine

So the structure is:

• subject in nominative
• verb
• prepositional phrase with pod + instrumental

That makes the grammar of the whole sentence very clear.