Soha nem úszom egyedül.

• soha = never
• nem = not
• úszom = I swim
• egyedül = alone

So the whole sentence means I never swim alone.

Yes, but in Hungarian this is normal and required.

Hungarian commonly uses negative words together with nem:

• soha nem = never
• senki nem = nobody / no one ... not
• semmi nem = nothing ... not

So Soha nem úszom is the natural Hungarian way to say I never swim.
You would not usually say just Soha úszom.

Both úszom and úszok can mean I swim.

For many verbs, the 1st person singular indefinite form can have two variants:

• -ok / -ek / -ök
• -om / -em / -öm

With úszik (to swim), úszom is a common standard form, and úszok also exists.

So:

• úszom = I swim
• úszok = also I swim

In this sentence, úszom is perfectly natural.

Because Hungarian usually doesn’t need subject pronouns when the verb ending already shows the subject.

The ending -om in úszom tells you the subject is I.

So:

• Úszom = I swim
• Én úszom = I swim too, but with extra emphasis on I

Hungarian often leaves out én unless it is needed for contrast or emphasis.

The dictionary form is úszik, meaning to swim.

This is the 3rd person singular form, which is the usual way Hungarian dictionaries list verbs.

A few forms:

• úszom = I swim
• úszol = you swim
• úszik = he/she/it swims

egyedül means alone, and here it works like an adverb, describing how the action happens.

So:

• egyedül = alone / by oneself

In Soha nem úszom egyedül, it tells us that the speaker does not swim by themself.

This word order is very natural, but Hungarian word order is often flexible and can change for focus or emphasis.

The neutral sentence is:

• Soha nem úszom egyedül.

Other orders may be possible in the right context, but they can sound more emphatic or marked.

A key point is that soha usually goes together with nem, and the verb often follows that negative structure:

• Soha nem úszom...

So for a learner, this sentence is a very good standard model.

A rough pronunciation guide:

• soha ≈ sho-ha
• nem = nem
• úszom ≈ oo-som
• egyedül ≈ eh-dye-dool

A few important pronunciation notes:

• ú is a long vowel, like a longer oo
• sz is pronounced like English s
• s by itself in Hungarian is pronounced like English sh
• gy is a soft consonant, somewhat like the dy sound in duke for many speakers

So:

• soha starts with sh, not s
• úszom has sz, so that part sounds like s, not sh

Putting soha first is the normal way to express never clearly and strongly.

Hungarian often places important sentence elements near the front. In a sentence with soha nem, this structure is very common:

• Soha nem + verb

So Soha nem úszom egyedül is the expected and natural order for I never swim alone.

Yes. That is just a more literal English way of expressing the same idea.

Hungarian Soha nem úszom egyedül corresponds to:

• I never swim alone
• literally, something like I not-ever swim alone

But the best natural English translation is still I never swim alone.

Usually, yes.

The present tense in Hungarian often expresses:

• a habit
• a general truth
• something that is generally true for the speaker

So Soha nem úszom egyedül usually means:

• I never swim alone as a general practice

Depending on context, it could also be understood as a firm rule the speaker follows.

You could say:

• Én soha nem úszom egyedül.

Adding én emphasizes the subject:

• I never swim alone.

This might be used for contrast, for example:

• Te szoktál egyedül úszni, de én soha nem úszom egyedül.
• You sometimes swim alone, but I never swim alone.

Without emphasis, Hungarian normally just says:

• Soha nem úszom egyedül.