Slarva inte med lösenordet; någon annan kan läsa det.

Slarva med is an idiomatic expression meaning to be careless with, to handle sloppily, or to neglect something.

So Slarva inte med lösenordet means something like:

• Don’t be careless with the password
• Don’t handle the password carelessly
• Don’t neglect password security

The verb slarva often suggests not taking something seriously enough.

Because Slarva is in the imperative form, used for commands.

• Slarva! = Be careless!
• Slarva inte! = Don’t be careless!

In Swedish, when you make a negative command, inte usually comes after the imperative verb:

• Gå inte dit. = Don’t go there.
• Glöm inte. = Don’t forget.
• Slarva inte med lösenordet. = Don’t be careless with the password.

So Inte slarva would not be the normal way to give this command.

Lösenordet is the definite form of lösenord.

• ett lösenord = a password
• lösenordet = the password

The ending -et marks definiteness here.

In this sentence, Swedish uses the definite form because it refers to a specific password, or to the password in question. In English, depending on context, we might say the password or sometimes your password, but Swedish often uses the definite form where English may choose a possessive.

Because lösenord is an ett-word (a neuter noun).

Swedish nouns are divided into two grammatical genders:

• en-words
• ett-words

Since lösenord is an ett-word:

• ett lösenord = a password
• lösenordet = the password

That -et is the usual definite singular ending for many ett-words.

Det refers back to lösenordet.

• lösenordet = the password
• det = it

Since lösenord is an ett-word, the matching pronoun is det.

So:

• någon annan kan läsa det = someone else can read it

If the noun were an en-word, the pronoun would often be den instead.

Någon annan means someone else or another person.

• någon = someone / anyone
• annan = other / another

Together, they mean someone other than you.

Examples:

• Någon annan vet det. = Someone else knows it.
• Jag vill prata med någon annan. = I want to speak with someone else.

In your sentence, någon annan warns that another person might gain access to the password.

Because slarva med is the normal expression.

The preposition med is part of how this verb is commonly used when you say what someone is being careless about.

Examples:

• slarva med läxorna = be careless with homework
• slarva med säkerheten = be careless with security
• slarva med lösenordet = be careless with the password

So it is not a literal with in every case; it is just the preposition that belongs with this expression.

Because this is a normal main clause with the subject first.

Swedish main clauses usually follow V2 word order, which means the finite verb comes in the second position. If nothing else is placed first, the subject usually comes first:

• Någon annan = subject
• kan = finite verb
• läsa det = rest of the clause

So:

• Någon annan kan läsa det. = Someone else can read it.

You would get Kan någon annan läsa det? if you were asking a question:

• Kan någon annan läsa det? = Can someone else read it?

Yes. Läsa normally means to read, and it works naturally here.

The idea is that if you are careless with the password, another person may be able to see and read it—for example, on a note, a screen, or a message.

So this sentence is specifically about someone being able to read the password, not necessarily guess it or hack it.

• läsa det = read it
• gissa det = guess it
• stjäla det = steal it

Kan is the present tense of kunna, which means can / to be able to.

So:

• någon annan kan läsa det = someone else can read it

It expresses possibility here: if you are careless, it is possible that another person will be able to read the password.

The semicolon links two closely related main clauses:

• Slarva inte med lösenordet
• någon annan kan läsa det

The relationship is basically cause and consequence:

• Don’t be careless with the password; someone else can read it.

A full stop would also be possible:

• Slarva inte med lösenordet. Någon annan kan läsa det.

The semicolon just makes the connection between the two ideas a little tighter.

It is fairly neutral and natural. It would fit well in:

• instructions
• warnings
• security advice
• workplace communication
• educational material

It is not especially slangy, and it is not overly formal either.

If you wanted a more formal or technical version, Swedish might use something like:

• Var inte oaktsam med lösenordet.
• Hantera lösenordet med försiktighet.

But Slarva inte med lösenordet is very idiomatic and easy to understand.

Yes, absolutely. That is a very natural English rendering.

Depending on context, possible translations include:

• Don’t be careless with the password.
• Don’t be sloppy about your password.
• Don’t neglect password security.

The exact English wording can vary, but the Swedish sentence clearly gives a warning about treating a password carelessly.