En kuuntele podcastia yöllä, jotta nukun hyvin.

Finnish normally drops the subject pronoun because the verb form already shows the person/number. En is the 1st person singular negative form, so (minä) is understood. You can add minä for emphasis/contrast, but it’s not required.

Finnish uses a separate negative verb that conjugates for person:

• en = I don’t
• et = you don’t
• ei = he/she/it doesn’t
  etc.

The main verb then appears in a special form (often called the connegative), which doesn’t show person. So:

• affirmative: (minä) kuuntelen = I listen
• negative: (minä) en kuuntele = I don’t listen

Because after the negative verb (en), the main verb does not take the normal personal ending (-n in kuuntelen). Instead it uses the connegative form kuuntele:

• kuuntelen (personal ending) → used in affirmative
• kuuntele (no personal ending) → used after en/et/ei...

It can look like an imperative form, but here it’s simply the negative construction.

In Finnish, a direct object is very often in the partitive in negatives. A good rule of thumb:

• negative clause → object tends to be partitive

So En kuuntele podcastia = I don’t listen to a/the podcast (at all / in general).

(Also, partitive can appear for other reasons too—like incomplete/ongoing actions—but the negative alone is enough to explain podcastia here.)

Finnish has no articles (a/the), so podcastia can correspond to a podcast, the podcast, or even podcasts depending on context. In this sentence, it most naturally sounds general: not listening to podcast(s) at night.

If you wanted to clearly mean “a specific podcast episode,” context would usually do that, or you might add something like tätä podcastia = this podcast.

Yöllä is yö (night) in the adessive case (-lla/-llä), which commonly expresses “at (a time)”:

• aamulla = in the morning / in the morning time
• illalla = in the evening
• yöllä = at night

So yöllä answers “when?”: “at night.”

Because jotta introduces a subordinate clause. In Finnish, subordinate clauses are normally separated from the main clause with a comma:

• En kuuntele podcastia yöllä, jotta nukun hyvin.

That comma is standard Finnish punctuation.

jotta introduces a clause of purpose/result, roughly “so that / in order that.” The structure is:

• main clause + jotta
  • verb clause

So the sentence links the action (not listening at night) with the goal/outcome (sleeping well).

Many learners are taught that purpose clauses with jotta often use the conditional:

• En kuuntele podcastia yöllä, jotta nukkuisin hyvin. = …so that I would sleep well (purpose/aim)

Using the present indicative:

• …jotta nukun hyvin can sound more like “so that / with the result that I sleep well,” and is also common in speech.

If you want the safest “textbook purpose” form, jotta nukkuisin hyvin is a strong choice.

hyvin is an adverb meaning “well.” It modifies the verb nukun (I sleep), so Finnish uses the adverb:

• hyvä = good (adjective; describes a noun)
• hyvin = well (adverb; describes an action)

So nukun hyvin = I sleep well.