Esiintyjä toi hyvän fiiliksen ja hurmasi yleisön.

Finnish has no articles. So words like esiintyjä and yleisö do not automatically show whether English would use a or the. Context tells you that.

So esiintyjä can mean either a performer or the performer, and yleisön can mean the audience in context.

Yes. Esiintyjä is a noun built from the verb esiintyä, which means to perform, to appear, or to go on stage.

So esiintyjä means performer, artist, presenter, or more generally someone who performs/appears.

The ending -jä / -ja often makes an agent noun, meaning a person who does something.

The sentence is in the past tense (often called the imperfect in Finnish grammar).

Both verbs are past-tense forms:

• toi = past of tuoda
• hurmasi = past of hurmata

So the sentence describes completed actions in the past.

Toi is the 3rd person singular past tense of tuoda (to bring).

So:

• tuoda = to bring
• hän tuo = he/she brings
• hän toi = he/she brought

This is one of those Finnish verbs whose past tense does not look fully predictable at first, so it is worth memorizing separately.

Because the past tense of hurmata is hurmasi.

So:

• hurmata = to charm, enchant
• hän hurmaa = he/she charms
• hän hurmasi = he/she charmed

Many Finnish verbs form the past tense in ways that you gradually get used to through exposure, so hurmasi is best learned as the normal past form of hurmata.

Because the same subject, esiintyjä, applies to both verbs.

So Finnish does not need to repeat it:

• Esiintyjä toi hyvän fiiliksen ja hurmasi yleisön.

This is completely natural and very common. English does the same thing:

• The performer brought a good vibe and charmed the audience.

You could repeat the subject in Finnish, but usually you would not unless you wanted extra emphasis or clarity.

Because this phrase is the object of the verb toi, and in this sentence it appears as a total object in the genitive singular form.

So:

• basic form: hyvä fiilis
• object form here: hyvän fiiliksen

Both words change because the adjective must agree with the noun:

• hyvä → hyvän
• fiilis → fiiliksen

This is a very important Finnish pattern: adjectives usually match the noun in case and number.

Yleisön is also a genitive singular form, and here it functions as a total object.

Basic form:

• yleisö = audience

Object form here:

• yleisön = the audience, as the whole affected object of the action

The idea is that the performer charmed the audience as a complete event. That is why Finnish uses this object form rather than the basic dictionary form yleisö.

Because both are treated as total objects:

• toi hyvän fiiliksen
• hurmasi yleisön

In Finnish, object case often reflects how the action is viewed. A total object often suggests a bounded/completed result. Here the performer successfully created a good feeling and charmed the audience, so that fits well.

This is why you see:

• hyvän fiiliksen
• yleisön

rather than the basic forms hyvä fiilis and yleisö.

Fiilis is a very common Finnish word, but it is a bit informal or colloquial in tone.

It comes historically from English feeling, and in Finnish it usually means something like:

• feeling
• mood
• vibe

So hyvä fiilis is something like a good feeling or a good vibe.

It is very common in speech and also appears a lot in media, entertainment, and casual writing. In more formal style, people might choose words like tunnelma or myönteinen ilmapiiri, depending on the exact meaning.

In principle, Finnish object case can change the nuance, but in this sentence the forms given are the most natural.

The sentence presents both actions as successful, whole events:

• the performer brought a good vibe
• the performer charmed the audience

That is why the total-object forms fit well.

If you changed the object case, the meaning or feel would change. Partitive often suggests something more ongoing, unbounded, incomplete, or less total. So for this sentence, the current forms sound the most natural and idiomatic.

Finnish word order is fairly flexible, but the current version is a very natural neutral order.

You could also say:

• Esiintyjä hurmasi yleisön ja toi hyvän fiiliksen.

That is still grammatical. It just puts the focus in a slightly different order.

The original sentence probably presents the ideas in a smooth rhetorical sequence: first the performer created a good atmosphere, and then charmed the audience.

The trickiest vowels for English speakers here are usually y, ä, and ö.

• y is like a Finnish front rounded vowel, somewhat similar to German ü
• ä is like the vowel in cat, but usually cleaner and steadier
• ö is similar to German ö or French eu in some words

A few quick notes:

• esiintyjä: pay attention to y and jä
• hyvän: the hy starts with that Finnish y sound
• yleisön: both y and ö matter here

Also, Finnish pronunciation is usually very consistent: once you know the sound of a letter, it is pronounced that way quite reliably.