1. the beginnings or starts of something, especially something unpleasant or difficult
Usage: plural of onset

Examples

• The onsets of winter storms can be sudden and dangerous.
• Doctors study the onsets of various diseases to improve early detection.
• The onsets of her migraines were becoming more frequent.
• Weather forecasters track the onsets of severe thunderstorms.
• The onsets of economic recessions often follow similar patterns.
• She noticed the onsets of fatigue after working long hours.