verb
to supplement, to complete
B1
ergänzen: to supplement; to complete; to add missing parts. Regular weak verb (ergänzte, ergänzt), auxiliary haben for perfect. Non‑reflexive and not separable. Usually takes a direct object (akkusativ). Common in editing or filling forms: 'etwas ergänzen' means add or complete information.
Examples
Ich ergänze den Satz.
I complete the sentence.
Ich habe den Text ergänzt.
I added to the text.
Der Redakteur ergänzte den Artikel, nachdem die Reporterin neue Informationen lieferte.
The editor supplemented the article after the reporter provided new information.
Details
Mnemonics
Imagine adding missing puzzle pieces to 'complete' a picture (ergänzen the puzzle)
think 'again-sen' → adding again: 'ergänzen' adds something
Notes
A regular verb meaning to add something to make it more complete. Common with 'durch' or direct objects.