filtern
to filter
To pass a liquid, a gas, or even light through a filter in order to remove unwanted substances or components from it.
EXAMPLE
Man sollte das Wasser filtern, bevor man es trinkt.
You should filter the water before drinking it.
filtern
to filter
filtern – filterte – hat gefiltert
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Meanings
filtern
to filter
In data processing, to selectively choose and display certain information from a large amount while the rest is hidden.
EXAMPLE
Ich kann die E-Mails in meinem Posteingang nach Absender filtern.
I can filter the emails in my inbox by sender.
Forms
Forms adapted from the German Wiktionary entry filtern, by Wiktionary contributors, licence CC BY-SA 4.0.
Present
| ich | filtere filtre |
|---|---|
| du | filterst |
| er/sie/es | filtert |
| wir | filtern |
| ihr | filtert |
| sie | filtern |
Simple past
| ich | filterte |
|---|---|
| du | filtertest |
| er/sie/es | filterte |
| wir | filterten |
| ihr | filtertet |
| sie | filterten |
Perfect
with haben
| ich | habe gefiltert |
|---|---|
| du | hast gefiltert |
| er/sie/es | hat gefiltert |
| wir | haben gefiltert |
| ihr | habt gefiltert |
| sie | haben gefiltert |
Commands
| du | filter! filtere!, filtre! |
|---|---|
| ihr | filtert! |
| Sie | filtern Sie! |
Past perfect
| ich | hatte gefiltert |
|---|---|
| du | hattest gefiltert |
| er/sie/es | hatte gefiltert |
| wir | hatten gefiltert |
| ihr | hattet gefiltert |
| sie | hatten gefiltert |
Future
| ich | werde filtern |
|---|---|
| du | wirst filtern |
| er/sie/es | wird filtern |
| wir | werden filtern |
| ihr | werdet filtern |
| sie | werden filtern |
Subjunctive I
| ich | filtere filtre |
|---|---|
| du | filterst |
| er/sie/es | filtere filtre |
| wir | filtern |
| ihr | filtert |
| sie | filtern |
Used for reported speech.
Subjunctive II
| ich | filterte |
|---|---|
| du | filtertest |
| er/sie/es | filterte |
| wir | filterten |
| ihr | filtertet |
| sie | filterten |
Used for wishes and “would”.
Other forms
| infinitive | filtern |
|---|---|
| with zu | zu filtern |
| present participle | filternd |
| past participle | gefiltert |
Usage tips
Word family
The verb 'filtern' (to filter) belongs to the word family around 'der Filter' (the filter). A filter is the device or material used to carry out the act of filtering.
EXAMPLE
Dieser spezielle Filter soll Schadstoffe aus der Luft filtern.
This special filter is designed to filter pollutants out of the air.
Context clue
The object of the verb makes the meaning clear. If you filter a physical substance like 'Wasser' (water), 'Luft' (air), or 'Kaffee' (coffee), the literal meaning is intended. If you filter digital information like 'E-Mails' (emails), 'Daten' (data), or 'Suchergebnisse' (search results), the figurative meaning from data processing is intended.
EXAMPLE
Die neue Maschine kann die Luft im Raum sehr effektiv filtern.
The new machine can filter the air in the room very effectively.
Ich muss meine Suchergebnisse filtern, um nur relevante Artikel zu sehen.
I need to filter my search results to see only relevant articles.
Use with 'aus'
When you want to say what is being removed, you often use the preposition 'aus' (out of/from). The structure is: [unwanted substances] aus [liquid/gas] filtern.
EXAMPLE
Die Anlage filtert kleinste Partikel aus dem Abwasser.
The system filters the tiniest particles out of the wastewater.
Sentence structure with 'nach'
In digital contexts, 'filtern' (to filter) is very often used with the preposition 'nach' (by/according to) to indicate the selection criterion. The structure is: [data] nach [criterion] filtern.
EXAMPLE
Du kannst die Tabelle nach dem Datum oder dem Preis filtern.
You can filter the table by date or price.
In real life
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