immediate
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immediately
Without culpable delay; as quickly as possible under the given circumstances. The term is often used in formal, official, or legal contexts and means 'sofort' (immediately).
Ein Schaden am Fahrzeug muss der Versicherung unverzüglich gemeldet werden.
Damage to the vehicle must be reported to the insurance company immediately.
The word is made up of 'un-' (not), 'Verzug' (delay), and the ending '-lich'. So it literally means 'without delay'.
Die Zahlung muss ohne Verzug erfolgen.
Payment must be made without delay.
'Unverzüglich' (immediately/without delay) is a formal word used mainly in official, legal, and business language. In everyday conversation with friends, it sounds unnaturally stiff.
Bitte informieren Sie uns unverzüglich über jegliche Änderungen Ihrer Adresse.
Please inform us immediately of any changes to your address.
'Unverzüglich' (immediately/without delay) is usually used as an adverb that further specifies an action. It emphasizes that something must happen without culpable hesitation and as quickly as possible.
Sie müssen sich nach Ihrer Ankunft unverzüglich beim Amt melden.
You must report to the office immediately after your arrival.
immediately
Sofort means that something should happen at that very moment and without delay. Unverzüglich sounds more formal or legal and requires action without culpable delay, that is, as quickly as possible under the circumstances. It therefore does not always refer to that very same moment.
Der Schaden ist der Versicherung unverzüglich zu melden.
The damage must be reported to the insurance company without undue delay.
Verlassen Sie das Gebäude sofort, denn es brennt.
Leave the building immediately because it is on fire.
