onset

US /ˈɑːn.set/
UK /ˈɑːn.set/
"onset" picture
1.

Beginn, Anfang

the beginning of something, especially something unpleasant

:
The onset of winter brought cold weather.
Der Beginn des Winters brachte kaltes Wetter.
Early onset of the disease makes it harder to treat.
Ein früher Beginn der Krankheit erschwert die Behandlung.