Dovodno crijevo jedva da propušta vodu.

It means supply hose, inlet hose, or feed hose, depending on context.

• dovodno = inlet / supply / feeding
• crijevo = hose / tube

So the phrase is a technical noun phrase: the inlet/supply hose.

Because it agrees with crijevo, which is a neuter singular noun.

In Croatian, adjectives change their endings to match the noun’s:

• masculine: dovodni
• feminine: dovodna
• neuter: dovodno

Since crijevo is neuter singular, the adjective must be dovodno.

Yes — it can mean both.

Croatian crijevo is used for:

• a biological intestine / gut
• a flexible hose / tube / pipe-like line

The context tells you which meaning is intended. In dovodno crijevo, it clearly means hose.

Jedva da means barely or hardly.

It expresses that something happens only to a very small degree. In this sentence, it means the hose lets through only a very small amount of water.

The da adds emphasis and makes the phrase feel a bit stronger or more expressive.

Yes, absolutely.

Both are correct:

• Dovodno crijevo jedva da propušta vodu.
• Dovodno crijevo jedva propušta vodu.

The version with da is a bit more emphatic or idiomatic in some contexts. The version without da is more straightforward.

It is the same word da, but here it is part of the fixed expression jedva da.

So in this sentence, it is best understood as a unit:

• jedva da = barely / hardly

You do not need to translate da separately here as that. It is helping form the meaning of the whole expression.

Here propušta means lets through, allows to pass, or possibly leaks, depending on the situation.

The verb propuštati can be used in several related ways:

• let something pass through
• allow through
• leak
• filter through

In this sentence, the basic idea is that water is passing through only with difficulty or in a very small amount.

Because propušta is the 3rd person singular present tense of the imperfective verb propuštati.

That fits well here because the sentence describes an ongoing state or general behavior:

• the hose barely lets water through

If you used a perfective form such as one based on propustiti, it would not sound right for this kind of ongoing meaning in normal usage.

So:

• propuštati = imperfective, ongoing/repeated/general
• propušta = it lets through / it leaks

Because vodu is the accusative singular form, and it is the direct object of propušta.

The noun voda is feminine, and its forms are:

• nominative: voda
• accusative: vodu

Since the hose is acting on the water — it is letting water through — Croatian uses the accusative:

• propušta vodu = lets water through

Because Croatian does not have articles like the or a/an.

Whether the meaning is the supply hose or a supply hose is usually understood from context.

If needed, Croatian can make this more explicit with other words, for example:

• to dovodno crijevo = that / the supply hose
• jedno dovodno crijevo = a / one supply hose

But in a normal sentence, no article is required.

Not completely, but the given order is the most natural and neutral one.

• Dovodno crijevo = subject
• jedva da = adverbial expression
• propušta = verb
• vodu = object

Croatian word order is flexible, but changes usually affect emphasis. For a learner, this version is the best pattern to remember.

It can suggest either, depending on context.

The verb propuštati vodu can mean:

• to let water through
• to leak water
• to pass water poorly / insufficiently

With jedva da, the main idea is simply that very little water is getting through. In real life, that could be because the hose is:

• partly blocked
• bent or pinched
• damaged
• functioning badly

So the exact interpretation depends on the situation, but the core meaning is: the hose barely passes water.