Die Absicht ist klar.

Because Absicht is a feminine noun in German. Its basic dictionary form is die Absicht.

In the nominative singular:

• der = masculine
• die = feminine
• das = neuter

So the sentence starts with die Absicht because Absicht is feminine and is the subject of the sentence.

It is in the nominative case because it is the subject of the sentence — the thing that is clear.

A good way to see it:

• Die Absicht = the subject
• ist = the verb
• klar = the description of the subject

So this is a standard subject + verb + complement sentence.

Because German main clauses normally follow the V2 rule: the conjugated verb comes in the second position.

Here the sentence is:

• Die Absicht = position 1
• ist = position 2
• klar = the rest

This is one of the most basic German sentence patterns.

Because klar is not being used before a noun here. It is being used after the verb ist as a predicate adjective.

In German:

• Before a noun, adjectives usually take endings:
  eine klare Absicht
• After sein, werden, bleiben, etc., adjectives usually do not take endings:
  Die Absicht ist klar

So:

• eine klare Absicht = an adjective directly modifying a noun
• Die Absicht ist klar = an adjective describing the subject after the verb

It is best understood as an adjective here.

It describes Absicht, and after the verb sein in German, adjectives stay in their basic form:

• Die Absicht ist klar.
• Der Plan ist gut.
• Das Ziel ist wichtig.

English learners sometimes think of this as similar to The intention is clear, where clear is also an adjective.

Ist is the 3rd person singular present tense form of sein (to be).

Forms of sein in the present tense include:

• ich bin
• du bist
• er/sie/es ist
• wir sind
• ihr seid
• sie/Sie sind

Since die Absicht is a singular noun, German uses ist.

Yes, but the basic version is the most neutral:

• Die Absicht ist klar.

You can also front klar for emphasis:

• Klar ist die Absicht.

But that sounds more literary, emphatic, or unusual in everyday speech. For normal use, Die Absicht ist klar is the natural order.

A rough guide:

• Absicht sounds approximately like AHP-zikht

A few details:

• Ab- has a short a
• The b in Abs- is often heard close to p because of the following consonant
• sicht has the ich-Laut sound in -icht, the soft German ch sound, not the hard k sound

If you already know words like ich or nicht, the ch in Absicht uses the same sound.

Absicht is common, but it is not exactly the same as Ziel or Plan.

Roughly:

• Absicht = intention
• Ziel = goal / aim
• Plan = plan

So:

• Absicht focuses on what someone intends
• Ziel focuses on what someone wants to achieve
• Plan focuses on the method or arrangement

They can overlap in meaning, but they are not interchangeable in every sentence.

Sometimes, but they are not identical.

• klar = clear
• deutlich = clear/distinct/obvious

In many contexts, klar is the most natural choice for saying that an intention is easy to understand. Deutlich can work too, but it may sound slightly different depending on context.

For a learner, Die Absicht ist klar is a very standard and natural sentence.

Because German often states the actual subject directly:

• Die Absicht ist klar.

English sometimes uses it in structures like It is clear, but in this sentence German simply says what is clear: the intention.

German can use es in some other sentence types, but here it is not needed.

Yes, grammatically that is possible:

• Eine Absicht ist klar.

But the meaning changes. It would mean one intention is clear or an intention is clear, which is less neutral and often sounds more context-dependent.

The original sentence with die sounds like it refers to a specific intention already known in context, or to the intention in a general but identifiable sense.

The plural is die Absichten.

So the sentence would become:

• Die Absichten sind klar.

Notice the changes:

• Absicht → Absichten
• ist → sind

Everything else stays the same, and klar still has no ending because it remains a predicate adjective after sein.