vergewissern

Vergewissern is a German verb meaning to make sure, to ascertain, or to verify. It is primarily used in the reflexive form sich vergewissern, meaning to reassure oneself or to confirm for oneself that something is true. The sense arises from the prefix ver- combined with Gewissheit (certainty), emphasizing the act of obtaining certainty through checking or confirming information.

Usage and constructions

The standard construction is sich vergewissern + dass-clause or sich vergewissern + ob-clause, as in Ich vergewissere mich, dass alle Türen geschlossen sind or Wir vergewisserten uns, ob die Daten korrekt sind. The non-reflexive form vergewissern exists but is far less common and tends to appear in older or more formal texts. Vergewissern is often used in formal, administrative, journalistic, or legal contexts, where accuracy and certainty are important.

Nuance and synonyms

Vergewissern emphasizes personal verification and the process of becoming certain, rather than merely checking a fact. It is somewhat more emphatic than synonyms such as prüfen (to check) or verifizieren (to verify, often in technical contexts). Related expressions include sicherstellen (to ensure) and feststellen (to determine).

Examples

- Ich vergewissere mich, dass alle Fenster geschlossen sind.

- Wir vergewisserten uns der Richtigkeit der Angaben.

- Bevor der Vertrag unterschrieben wird, vergewissern sich die Parteien über alle Details.

Etymology

The word derives from ver- plus Gewissheit (certainty), linking the act of verification to attaining certainty.