ablenken
to distract
To direct a person's attention away from something and toward something else. This can happen intentionally or unintentionally.
Der laute Knall hat mich von meiner Arbeit abgelenkt.
The loud bang distracted me from my work.

to distract / to deflect
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to distract
To direct a person's attention away from something and toward something else. This can happen intentionally or unintentionally.
Der laute Knall hat mich von meiner Arbeit abgelenkt.
The loud bang distracted me from my work.

'Ablenken' (to distract / to deflect) is a separable verb. The prefix 'ab-' is separated from the verb in a main clause and placed at the end of the sentence. In the infinitive with 'zu', 'zu' comes between the prefix and the verb.
Das laute Telefonat lenkte alle Kollegen ab.
The loud phone call distracted all the colleagues.
The verb is made up of the prefix 'ab-' (away) and the verb 'lenken' (to steer/direct). It literally means to 'steer away' something from its original course or focus.
Er versuchte, vom eigentlichen Thema des Gesprächs abzulenken.
He tried to distract from the actual topic of the conversation.
If you want to express what someone is being distracted from, you use the preposition 'von' with the dative. The structure is: distract someone (accusative) from something (dative).
Lass dich nicht von den lauten Kindern beim Lernen ablenken.
Don't let the loud children distract you from studying.
In the meaning 'sich zerstreuen' (to distract oneself), the verb is used reflexively: 'sich ablenken' (to distract oneself). This describes a deliberate action to avoid thinking about something unpleasant.
Nach der Prüfung ging sie ins Kino, um sich ein wenig abzulenken.
After the exam, she went to the movies to distract herself a little.
This meaning is often used in sports contexts (to deflect a ball or shot) or in conversations (to steer away from the topic). It is about changing the physical or metaphorical direction of something.
Der Torwart konnte den Schuss im letzten Moment noch zur Seite ablenken.
The goalkeeper was still able to deflect the shot to the side at the last moment.
to disturb / bother
'stören' and 'ablenken' can both happen when someone wants to concentrate. 'stören' means that someone or something interrupts or hinders peace and quiet or work. 'ablenken' means more specifically that attention is directed away from one thing and toward something else. So something can distract you without strongly disturbing you, for example an interesting conversation next door. Conversely, something can disturb you without really directing your attention to another topic, for example a broken printer. When talking about concentration, both words are possible, but 'ablenken' emphasizes attention.

Die Musik im Nebenraum lenkt Max beim Lernen ab.
The music in the next room distracts Max while he is studying.
In der Bibliothek stört lautes Telefonieren die anderen Besucher.
In the library, talking loudly on the phone disturbs the other visitors.