to look up / read up
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to look up
To read something in order to check or confirm information, or to bring something back to mind.
Ich muss die genauen Termine in der E-Mail noch einmal nachlesen.
I still need to look up the exact dates in the email again.
to read up
To inform oneself about a particular topic or acquire knowledge by reading.
Die Details zur Französischen Revolution kann man in jedem Geschichtsbuch nachlesen.
You can read up on the details of the French Revolution in any history book.
'Nachlesen' (to look up/read up) is a separable verb. The prefix 'nach-' goes at the end in a main clause; in subordinate clauses and in the infinitive with 'zu', it stays attached to the verb.
Ich lese die Informationen später noch einmal nach.
I'll look up the information again later.
You look something up (accusative) in a source (dative). So the structure is: [etwas] in [einer Quelle] nachlesen ([something] in [a source] look up).
Du kannst die Öffnungszeiten auf der Webseite nachlesen.
You can look up the opening hours on the website.
This meaning is often used when checking a specific piece of information. Words like 'nochmal' (again), 'kurz' (quickly/briefly), or 'genau' (exactly/carefully) point to this.
Kannst du die Adresse in deiner Bestätigungsmail kurz nachlesen?
Can you quickly look up the address in your confirmation email?
When you inform yourself about a topic, the source is often named. Typical combinations are 'im Internet nachlesen' (to read up online), 'im Lexikon nachlesen' (to look it up in an encyclopedia), or 'in einem Fachbuch nachlesen' (to read up in a specialist book).
Alles Wichtige zu diesem Thema können Sie online nachlesen.
You can read up on everything important about this topic online.
to look up / check / forgive
Nachlesen and nachsehen can both be used to check information. Nachlesen emphasizes actually reading the relevant information, while nachsehen refers more generally to searching for or checking something in a source. When reading is the focus, nachlesen is appropriate; otherwise, nachsehen can be used.
Ich lese die genaue Abfahrtszeit noch einmal im Fahrplan nach.
I am looking up the exact departure time in the timetable once more.
Ich sehe die genaue Abfahrtszeit noch einmal im Fahrplan nach.
I am checking the exact departure time in the timetable once more.
