Minnet er tydelig.

Because minnet is the definite singular form of the noun et minne.

• et minne = a memory
• minnet = the memory

So the sentence is talking about a specific memory, not just any memory.

The dictionary form is et minne.

That means:

• the noun is neuter
• the indefinite singular is et minne
• the definite singular is minnet

A quick pattern:

• et minne = a memory
• minnet = the memory
• minner = memories
• minnene = the memories

In Norwegian, the definite article is often attached to the end of the noun instead of standing as a separate word.

So English:

• the memory

becomes Norwegian:

• minnet

The -et ending is doing the job of English the here.

Er is the present tense of å være, which means to be.

So:

• er = is / am / are, depending on context

In this sentence, Minnet er tydelig follows the very common pattern:

• subject + er + adjective

So literally, it is:

• The memory is clear/distinct.

Because tydelig is one of the adjectives that does not add an extra -t in the neuter singular.

Many Norwegian adjectives do change in neuter:

• en fin bil
• et fint hus

But adjectives ending in -ig usually do not add -t:

• en tydelig lyd
• et tydelig svar

So both common gender singular and neuter singular use tydelig.

Because here tydelig is a predicate adjective, not an adjective directly attached to the noun.

Compare:

• Minnet er tydelig = The memory is clear.
• et tydelig minne = a clear memory

In the sentence you gave, the structure is:

• Minnet = subject
• er = verb
• tydelig = adjective describing the subject after the verb

That is very similar to English.

You would say:

• et tydelig minne = a clear memory
• det tydelige minnet = the clear memory

Notice what happens in the definite phrase:

• det
  • tydelige
    • minnet

This is a common Norwegian pattern called double definiteness: you often use both a definite marker before the adjective and a definite ending on the noun.

Tydelig is grammatical and understandable. It suggests that the memory is distinct, easy to make out, or clearly present.

Depending on context, Norwegian might also use:

• klart = clear
• levende = vivid

For example:

• Minnet er klart = The memory is clear.
• Minnet er levende = The memory is vivid.

So tydelig works, but another adjective may sometimes sound more natural depending on the exact nuance you want.

You would invert the word order:

• Er minnet tydelig? = Is the memory clear?

This is a very common Norwegian rule. In a basic yes/no question, the verb usually comes first.

Compare:

• Minnet er tydelig. = The memory is clear.
• Er minnet tydelig? = Is the memory clear?

That is a good question, because minnet can also be a form of the verb å minne.

But in this sentence, it is clearly a noun, because the structure is:

• Minnet = subject
• er = main verb
• tydelig = adjective

If minnet were a verb, you would expect a different structure, such as:

• Han minnet meg på det. = He reminded me of it.

So in Minnet er tydelig, minnet must be the noun meaning the memory.

They are related, but they are not the same.

• et minne = a memory, a recollection, something remembered
• hukommelse = memory as a mental ability or capacity

So:

• Minnet er tydelig talks about one specific memory
• Hun har god hukommelse means She has a good memory

A native English speaker may want to use memory for both ideas, but Norwegian often separates them more clearly.

A simple English-friendly approximation is:

• MIN-neh er TY-de-li

A few helpful notes:

• minnet has stress on the first syllable: MIN-
• the tt/d sound in tydelig is softer than in English
• the final g in tydelig is often weak or not strongly pronounced in many varieties of Norwegian

The exact pronunciation can vary by dialect, but that approximation will usually be understood.