
der Antritt
start
The beginning or taking up of an activity, office, or journey.
Der Antritt seiner neuen Stelle als Direktor wurde mit einer kleinen Feier begangen.
The start of his new position as director was marked with a small celebration.
start / acceleration
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start
The beginning or taking up of an activity, office, or journey.
Der Antritt seiner neuen Stelle als Direktor wurde mit einer kleinen Feier begangen.
The start of his new position as director was marked with a small celebration.

acceleration
In sports, the ability to accelerate quickly from a standstill or from slow movement.
Der Radrennfahrer ist für seinen explosiven Antritt am Berg bekannt.
The racing cyclist is known for his explosive acceleration on climbs.
'Antritt' (start / acceleration) is the noun form of the verb 'antreten' (to take up / to begin / to step up). The verb literally means 'to step up to something' or 'to begin something'. This idea of the 'first step' explains both the beginning of an office and acceleration in sports.
Der neue Präsident wird morgen sein Amt antreten.
The new president will take office tomorrow.
The context makes the meaning clear. If it is about an office, a position, or a journey, it means the beginning. If it is about sports and speed, it means quick acceleration.
Vor dem Antritt seiner Weltreise musste er noch viel organisieren.
Before the start of his trip around the world, he still had a lot to organize.
In the meaning 'Beginn' (beginning), 'Antritt' (start) is very often combined with a noun in the genitive that describes the activity or position more precisely. Typical examples are 'der Antritt des Dienstes' (the start of duty) or 'der Antritt der Nachfolge' (the assumption of succession).
Der Antritt seines neuen Amtes wurde in der Presse ausführlich kommentiert.
The start of his new office was covered in detail in the press.
In a sports context, 'Antritt' (acceleration) is often combined with adjectives that describe the quality of the acceleration. Common combinations are 'ein schneller Antritt' (quick acceleration), 'ein explosiver Antritt' (explosive acceleration), or 'ein starker Antritt' (strong acceleration).
Dank seines starken Antritts konnte der Sprinter das Rennen gewinnen.
Thanks to his strong acceleration, the sprinter was able to win the race.
beginning
Beginn is the general term for the temporal start. Antritt more specifically refers to actively taking up an activity or office, as well as setting off on a journey. With an office, both are possible, but Antritt emphasizes taking it over.

Ihr Antritt als Bürgermeisterin ist für Januar vorgesehen.
Her taking office as mayor is scheduled for January.
Der Beginn ihrer Amtszeit ist für Januar vorgesehen.
The beginning of her term in office is scheduled for January.