Johto on irti.

Here johto most naturally means a wire, cable, cord, or lead.

A useful thing to know is that johto can also mean management or leadership in other contexts. For example, yrityksen johto means the company’s management. But in Johto on irti, the physical meaning is the natural one: some kind of cable or wire is loose or disconnected.

On is the 3rd person singular form of the verb olla, which means to be.

So:

• minä olen = I am
• sinä olet = you are
• hän on = he/she is
• johto on = the cable is

In this sentence, on simply means is.

Irti means something like loose, detached, off, or disconnected, depending on context.

In Johto on irti, it suggests that the cable/wire is not properly attached anymore.

Some natural English translations could be:

• The cable is loose.
• The wire is disconnected.
• The cord has come off.

The exact English wording depends on the situation.

Johto is in the nominative singular, which is the basic dictionary form.

That is what you normally expect for the subject of a sentence like this:

• Johto = subject
• on = verb
• irti = complement

So grammatically, this works like:

• Talo on iso. = The house is big.
• Ovi on auki. = The door is open.
• Johto on irti. = The cable is loose/disconnected.

Finnish does not have articles like a/an and the.

So johto can mean:

• a cable
• the cable

Which one is meant depends on context.

If the situation already makes it clear which cable is being discussed, English will often use the, but Finnish still just says johto.

Irti is one of those Finnish words that often behaves like an adverb-like state word or a fixed predicative expression. In sentences like this, it usually stays in the same form.

That is why you say:

• Johto on irti.
• Kengännauha on irti. = The shoelace is loose.
• Nappi on irti. = The button is off / has come loose.

Unlike many ordinary adjectives, irti does not usually agree with the noun in number and case in the same way an English speaker might expect.

Yes, in theory johto is ambiguous because it can also mean leadership or management.

So taken completely out of context, Johto on irti could look odd or ambiguous to a learner. But in normal real-life use, context usually makes the meaning obvious.

For example:

• In a repair situation, it clearly means the wire/cable is loose.
• In a business context, johto would more likely mean management, but irti would then sound unusual unless used figuratively.

So this sentence is most naturally understood physically, not abstractly.

The neutral word order is:

Johto on irti.

This is the most natural basic order: subject + verb + complement.

Finnish word order is somewhat flexible, but changing it changes emphasis. For example:

• Johto on irti. = neutral statement
• Irti on johto. = marked, unusual, strongly focused style
• Johto irti. = possible in notes, warnings, or very compressed speech, but not the normal full sentence

So for learners, Johto on irti is the form to remember.

This is an important distinction.

• Johto on irti = the cable is loose / detached / disconnected
• Johto on poikki = the cable is broken / snapped in two

So irti does not necessarily mean the wire itself is damaged. It may just have come loose from where it should be attached.

But poikki means there is an actual break.

To make it negative:

• Johto ei ole irti. = The cable is not loose / disconnected.

Notice that Finnish uses the negative verb ei, and the main verb appears in a special form:

• on → ole

To make it a yes/no question:

• Onko johto irti? = Is the cable loose?

Here -ko is the question particle added to the verb.

So you get:

• Johto on irti. = The cable is loose.
• Johto ei ole irti. = The cable is not loose.
• Onko johto irti? = Is the cable loose?

Yes. Johto on irti describes the state: the cable is loose.

If you want to describe the event of becoming loose, Finnish often uses irrota:

• Johto irtosi. = The cable came loose.
• Johto on irronnut. = The cable has come loose.

So there is a useful difference:

• Johto on irti. = it is in the loose/disconnected state
• Johto irtosi. = it became loose
• Johto on irronnut. = it has come loose

That distinction is very common in Finnish.