Ég man ekki PIN-númerið mitt.

Muna is the infinitive, meaning to remember. In the present tense, after ég, the verb changes to man.

So:

• að muna = to remember
• ég man = I remember

This verb is somewhat irregular, so the form is not what you might guess from the infinitive.

Useful present-tense forms:

• ég man
• þú manst
• hann/hún/það man
• við munum
• þið munið
• þeir/þær/þau muna

In a simple Icelandic main clause, ekki usually comes after the finite verb.

So:

• Ég man ekki = literally I remember not

That is the normal Icelandic way to say I do not remember.

English uses do not for negation, but Icelandic does not need an extra helping verb here.

It has three parts:

• PIN = the acronym
• númer = number
• -ið = the definite article for a neuter singular noun, meaning the

So:

• PIN-númer = PIN number
• PIN-númerið = the PIN number

The definite article in Icelandic is often attached to the end of the noun instead of being a separate word like English the.

Yes, if you translate it word-for-word, it looks a bit like the PIN number my. But that is a very normal Icelandic structure.

With possessives, Icelandic often uses:

• definite noun + possessive

For example:

• bókin mín = my book
• húsið mitt = my house
• PIN-númerið mitt = my PIN number

So this is not bad or redundant Icelandic. It is the standard pattern.

Because mitt must agree with númer, and númer is a neuter singular noun.

The possessive pronoun changes to match the noun’s gender, number, and case.

For minn / mín / mitt:

• minn = masculine singular
• mín = feminine singular
• mitt = neuter singular

Since númer is neuter, you get mitt.

It is the object of the verb muna/man, and this verb takes the accusative.

So PIN-númerið mitt is in the accusative here.

A detail that can confuse learners: for many neuter singular nouns, the nominative and accusative look the same. So even though this is accusative, the form is still PIN-númerið mitt.

In Icelandic, a foreign abbreviation or acronym is often joined to an Icelandic word with a hyphen.

So:

• PIN-númer

Then the Icelandic ending is added to the final noun:

• PIN-númerið

The hyphen helps show that PIN is an abbreviation attached to the Icelandic noun númer.

It is a different vowel sound. The accent is not optional.

In Icelandic, é is its own letter/sound, not just a decorated e. So Ég must be written with the accent.

For an English speaker, Ég is often roughly approximated as yeg, though the exact pronunciation is more subtle in real Icelandic speech.

Yes, if the context already makes it clear whose PIN number you mean.

• Ég man ekki PIN-númerið. = I don't remember the PIN number.
• Ég man ekki PIN-númerið mitt. = I don't remember my PIN number.

Adding mitt makes it specifically my PIN number, rather than just some PIN number already understood from context.