הקיר ליד החלון נקי, אבל הרצפה עדיין מלוכלכת.

A common reading is:

ha-kir le-yad ha-khalon naki, aval ha-ritzpah adayin melukhlekhet

A few helpful notes:

• ח and sometimes כ are often pronounced like kh, a throaty sound, not like English k.
• נקי = naki
• מלוכלכת = melukhlekhet
• עדיין = adayin

In normal modern Hebrew writing, vowel marks are usually omitted, so learners gradually learn the pronunciation from familiarity and context.

In Hebrew, present-tense sentences often do not use a word for is/are.

So:

• הקיר ליד החלון נקי literally looks like the wall ליד the window clean
• but it means the wall next to the window is clean

And:

• הרצפה עדיין מלוכלכת literally looks like the floor still dirty
• but it means the floor is still dirty

This is completely normal in Hebrew. In past and future tenses, Hebrew does use forms of to be.

ה־ is the Hebrew definite article, meaning the.

So:

• קיר = wall

• הקיר = the wall

• חלון = window

• החלון = the window

• רצפה = floor
• הרצפה = the floor

Hebrew attaches the directly to the beginning of the noun instead of writing it as a separate word.

Because here they are predicate adjectives, not adjectives directly attached to the noun inside a noun phrase.

Compare these:

• הקיר נקי = the wall is clean
• הקיר הנקי = the clean wall

And:

• הרצפה מלוכלכת = the floor is dirty
• הרצפה המלוכלכת = the dirty floor

So in your sentence, נקי and מלוכלכת are saying what the wall and floor are, not forming phrases like the clean wall.

Because Hebrew adjectives must agree with the noun in gender and number.

Here:

• הקיר is masculine singular, so the adjective is נקי
• הרצפה is feminine singular, so the adjective is מלוכלכת

This kind of agreement is very important in Hebrew.

For example:

• masculine singular: נקי
• feminine singular: נקייה

and

• masculine singular: מלוכלך
• feminine singular: מלוכלכת

Usually, you learn the gender together with each noun.

In this sentence:

• קיר is masculine
• חלון is masculine
• רצפה is feminine

Sometimes noun endings help, but not always reliably. For example, many feminine nouns end in ־ה or ־ת, and רצפה does end in ־ה, which fits that pattern. But the safest habit is to memorize each new noun with its gender.

ליד means next to, beside, or by.

So:

• הקיר ליד החלון = the wall next to the window

It introduces a location in relation to something else. In this sentence, it tells you which wall we are talking about.

Because ליד is a full preposition-like word, so the article stays on the noun after it:

• ליד החלון = next to the window

This is different from one-letter prepositions such as ב, ל, and כ, which often combine with ה־.

So:

• ב + הבית becomes בבית in many contexts
• but ליד stays separate: ליד הבית

It describes the wall.

The structure is:

• הקיר ליד החלון = the wall next to the window
• נקי = is clean

So the whole first clause means:

• The wall next to the window is clean

A good way to see it is that ליד החלון helps identify which wall.

עדיין means still here.

So:

• הרצפה עדיין מלוכלכת = the floor is still dirty

Its position is very natural in Hebrew: after the subject and before the adjective or other main information.

You may also see עדיין in other places depending on emphasis, but this placement is standard and easy to understand.

Yes, אבל means but.

It connects the two contrasting parts:

• the wall ... is clean
• but the floor is still dirty

That is a very normal use of אבל, just like English but.

Because Hebrew often uses a comma before אבל when it connects two full clauses, much like English often does before but.

So the punctuation here is very natural:

• הקיר ליד החלון נקי, אבל הרצפה עדיין מלוכלכת.

It helps separate the two ideas clearly.

Then you would use an adjective directly attached to the noun, and the adjective would also take ה־ if the noun is definite.

So:

• הקיר הנקי = the clean wall
• הרצפה המלוכלכת = the dirty floor

But in your sentence, the structure is different:

• הקיר נקי = the wall is clean
• הרצפה מלוכלכת = the floor is dirty

That difference between attached adjective and predicate adjective is one of the most important things to notice here.