IPA: /ˈsuːnɪst/
KK: /sunɪst/
The earliest time something can happen or be done.
I will arrive at the soonest possible time to help you.
At the earliest possible time; as soon as possible.
I will call you back at the soonest opportunity.
**Soonest** → It is formed from "soon" (from Old English *sōna*, meaning immediately or at once) and the superlative suffix "-est" (meaning most). The word "soonest" means at the earliest possible time or most immediately.
Think of 'soon' meaning immediately, and the '-est' indicates the most. This helps you remember that 'soonest' refers to the earliest time possible.