Wow

How often do you exclaim, “Wow!”
 
Wow is originally a Scottish word, meaning a natural expression of amazement. When you say, “Wow”, you have to stretch your mouth wide open, as in ‘jaw dropping’.
 
Who knows how long people have been saying, “Wow!” Probably for a long time before the word wow first appears in writing in the 1510s.
 
The verb ‘to wow’, meaning to overwhelm with delight or amazement, is from American slang of the 1920s.
 
Reference: Online Etymological Dictionary, https://www.etymonline.com/
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