kurzerhand
without hesitation
Without lengthy hesitation or further fuss; quickly and decisively.
Da der Bus nicht kam, nahm sie kurzerhand ein Taxi.
Since the bus didn't come, she took a taxi without hesitation.

without hesitation
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without hesitation
Without lengthy hesitation or further fuss; quickly and decisively.
Da der Bus nicht kam, nahm sie kurzerhand ein Taxi.
Since the bus didn't come, she took a taxi without hesitation.

The word is made up of 'kurz' (short) and 'Hand' (hand). The idea is to get something done 'mit kurzer Hand' (with a short hand), meaning without detours and quickly.
Er entschied kurzerhand, das Jobangebot anzunehmen.
He decided without hesitation to accept the job offer.
As an adverb, 'kurzerhand' (without hesitation) can be placed flexibly in a sentence. It can appear in position 1, which emphasizes decisiveness, or inside the sentence before or after the object.
Kurzerhand packte sie ihre Sachen und verließ das Haus.
Without hesitation, she packed her things and left the house.
'Kurzerhand' (without hesitation) is often combined with verbs that express a quick decision or action. Typical phrases are 'kurzerhand entscheiden' (to decide without hesitation), 'kurzerhand machen' (to simply do something), or 'kurzerhand absagen' (to cancel without hesitation).
Da der letzte Zug weg war, übernachtete er kurzerhand bei einem Freund.
Since the last train had already left, he simply stayed overnight at a friend's place.
immediately
'sofort' and 'kurzerhand' can both express that something happens quickly. The difference is in the focus: 'sofort' emphasizes the timing, meaning without delay. 'kurzerhand' emphasizes a quick, decisive decision without a long discussion or preparation. 'sofort' fits almost any situation, including commands or reactions. 'kurzerhand' sounds more natural when someone solves a problem simply and directly.

Als der Bus nicht kam, nahm Herr Schneider kurzerhand ein Taxi.
When the bus didn’t come, Mr. Schneider took a taxi without hesitation.
Wir müssen die Rechnung sofort bezahlen, sonst gibt es eine Mahnung.
We have to pay the bill immediately, otherwise there will be a reminder.