IPA: /suːn/
KK: /sun/
In a short amount of time; not long from now.
I will call you soon.
The word 'soon' originates from Old English 'sona', meaning immediately or at once. It conveys the idea of something happening in a short time frame.
Think of 'soon' as meaning something that happens 'immediately' — it helps you remember that soon refers to a short time away.