onset

What does "onset" mean?
The word "onset" refers to the initial stage or the moment something begins, especially when that something is unpleasant or significant, like a disease, a storm, or a difficult period. Think of it as the starting gun for a process that is often unfolding or looming, rather than a simple, happy start. It is most commonly used in technical, medical, or formal contexts. You will frequently hear it paired with negative events, such as "the onset of winter," "the onset of symptoms," or "the onset of war," highlighting the transition from a state of calm into a state of activity or distress.
"onset" in conversation
Doctor's office
When did you first notice the onset of these headaches?
When did you first notice the onset of these headaches?
It started about three days ago, right after I caught that cold.
It started about three days ago, right after I caught that cold.
Used here to pinpoint the exact start of a medical condition.
Discussing the weather
We should head back inside before the onset of the storm.
We should head back inside before the onset of the storm.
Good idea, the sky is turning a very strange shade of gray.
Good idea, the sky is turning a very strange shade of gray.
Highlights the shift into an impending weather event.
"onset" in a sentence
The onset of the movie was quite slow.
The onset of the movie was quite slow.
Early treatment can delay the onset of the disease.
Early treatment can delay the onset of the disease.
With the sudden onset of winter, the mountain pass became impassable for most vehicles.
With the sudden onset of winter, the mountain pass became impassable for most vehicles.