Я не виходжу з дому, коли на вулиці слизько.

Виходжу comes from виходити / вийти, which means to go out, to leave.

In this sentence, виходжу is the imperfective present form, so it fits a habitual / repeated meaning:
I don’t go out / I don’t leave the house when...

Why not the others?

• йду = I am going / I’m walking
  This is more about the action of going, not specifically going out from inside.
• вийду = I will go out / I will leave
  This is future perfective, so it would describe a single future action, not a general rule.

So Я не виходжу з дому... sounds like a general habit or usual behavior.

In Ukrainian, the present tense is often used for regular, repeated, or general actions, just like in English:

• Я не виходжу з дому, коли... = I don’t leave the house when...
• Вона п’є каву вранці. = She drinks coffee in the morning.

So не виходжу does not mean only I am not going out right now. In context, it means I don’t go out / I don’t leave the house as a general rule.

After the preposition з here, Ukrainian uses the genitive case to show movement out of somewhere.

So:

• дім = house, home
• з дому = out of the house / from home

This is why you do not use the basic dictionary form дім after з in this sentence.

A useful pattern:

• з Києва = from Kyiv
• з роботи = from work
• з дому = from home

Both дому and дома can be genitive forms of дім, and both exist in Ukrainian. But з дому is a very common and natural expression meaning from home / out of the house.

For a learner, the safest thing is simply to remember:

• Я вдома = I’m at home
• Я виходжу з дому = I’m leaving home / I go out from home

So even though you may see other forms in dictionaries or literature, з дому is the standard phrase to learn first.

Коли means when, but in sentences like this it often has the sense of whenever.

So:

• Я не виходжу з дому, коли на вулиці слизько.
  = I don’t go out when / whenever it’s slippery outside.

This describes a repeated situation or a habit.

By contrast, якщо means if and sounds more conditional or hypothetical:

• Я не вийду з дому, якщо на вулиці буде слизько.
  = I won’t leave the house if it’s slippery outside.

That version is more about one future situation, not a general rule.

Yes, literally на вулиці means on the street, but in Ukrainian it is also a very common way to say outside / outdoors.

So in many contexts:

• на вулиці холодно = it’s cold outside
• на вулиці темно = it’s dark outside
• на вулиці слизько = it’s slippery outside

This is one of those phrases that should be learned as a natural expression, even if the literal wording feels a bit different from English.

Here вулиці is in the locative case because it follows the preposition на in a location meaning:

• вулиця = street
• на вулиці = on the street / outside

The locative is commonly used after в and на when talking about being in or at a place.

Compare:

• на столі = on the table
• у школі = at school
• на вулиці = outside / on the street

Ukrainian often does not use a present-tense verb equivalent to is in sentences like this.

So:

• на вулиці слизько literally looks like outside slippery
• natural English: it is slippery outside

This is completely normal in Ukrainian. In the present tense, бути (to be) is usually omitted.

So the structure is not incomplete. It is a normal Ukrainian sentence pattern.

Слизько is not a normal adjective here. It is a predicative word or state word, used in impersonal expressions about conditions.

It works like:

• холодно = cold
• тепло = warm
• темно = dark
• слизько = slippery

These words often describe the environment rather than a specific noun.

So:

• Дорога слизька. = The road is slippery.
  Here слизька is a regular adjective agreeing with дорога.
• На вулиці слизько. = It’s slippery outside.
  Here слизько describes the general condition.

Because Ukrainian commonly uses impersonal constructions for weather, environment, and general conditions.

English often needs a dummy subject:

• it’s cold
• it’s dark
• it’s slippery

Ukrainian usually does not:

• холодно
• темно
• слизько

So на вулиці слизько is the normal way to express that idea. There is no need for a separate word meaning it.

Yes. Ukrainian word order is fairly flexible, though the default version here is very natural:

• Я не виходжу з дому, коли на вулиці слизько.

You could also say:

• Коли на вулиці слизько, я не виходжу з дому.

This puts more focus on the condition first: When it’s slippery outside, I don’t leave the house.

The meaning stays basically the same. The difference is mostly about emphasis and flow.

In Ukrainian, не is usually written separately with verbs:

• не знаю = I don’t know
• не хочу = I don’t want
• не виходжу = I don’t go out / I don’t leave

So не виходжу is the normal spelling.

Learners sometimes expect a single word because some languages attach negation more tightly, but in Ukrainian with verbs, separate spelling is the standard pattern.

Yes, that is a very natural interpretation.

The phrase на вулиці слизько is somewhat broad. It can mean:

• it’s slippery outside
• the street is slippery
• the roads/sidewalks are slippery
• conditions outside are icy/slippery

So depending on context, English could translate it in slightly different ways. The Ukrainian sentence itself sounds normal and natural for any of those general slippery-outside meanings.