انا عارف سنه.

A common Egyptian pronunciation is roughly ana ʿāref senno.

• انا = ana
• عارف = ʿāref
• سنه = senno

The sound written ʿ comes from the Arabic letter ع, which does not have an exact English equivalent.

Here, سنه means his age.

It is built from:

• سِنّ = age
• ـه = his

So سنه literally means his age.

This is different from سنة with ة, which means year.

In Egyptian Arabic, عارف is an active participle, but it is very commonly used like a normal everyday way to say I know or I’m aware.

So أنا عارف سنه is a very natural colloquial sentence.

You may also hear أنا أعرف سنه, but أنا عارف... is especially common in speech when talking about a current state of knowing.

Because Arabic normally does not use a separate present-tense verb to be in sentences like this.

So أنا عارف literally looks something like I knowing, but the real meaning is I am aware / I know.

This is normal Arabic grammar, not something missing.

The first letter is ع (ʿayn).

It is a deep throat sound with no exact English equivalent. English speakers often find it difficult at first. A good beginner goal is not perfection, but learning to hear that عارف starts with a special sound and is not just arif.

Listening and repeating native audio helps a lot with ع.

Arabic often uses attached pronouns instead of separate words.

So instead of saying something like the age of him, Arabic simply adds ـه to the noun:

• سِنّ = age
• سنه = his age

So the his is already built into the word.

That is a feature of Egyptian pronunciation.

In Egyptian Arabic, the attached masculine pronoun ـه is often pronounced roughly like -o after a consonant. So سنه is commonly heard as senno.

So the spelling is Arabic, but the pronunciation reflects Egyptian speech.

A female speaker would usually say:

أنا عارفة سنه

Only عارف changes to عارفة, because it agrees with the speaker.

The word سنه stays the same.

In Egyptian Arabic, the most natural negation here is:

أنا مش عارف سنه

That means I don’t know his age.

If you use the verb أعرف instead, you can also hear:

أنا معرفش سنه

Both are understandable, but مش عارف is very common with عارف.

This sentence sounds clearly colloquial, especially because of the very natural Egyptian use of عارف for I know.

In Modern Standard Arabic, a more standard phrasing would usually use أعرف, for example:

أنا أعرف عمره

So the Egyptian flavor here is mainly in the everyday colloquial style and pronunciation.