Not one whit. Word origins

 https://idioms.thefreedictionary.com/not+one+whit

See the word history guy https://www.youtube.com/shorts/EHZgK2s-ejc

None is a combo of 3 words… of 

• Naht (like german nicht)
• Naht is a shortening of nanwiht, also nawhit
• Wiht is related to “wight” and “whit”, those mean an animal, a bit, or a thing.  
• Nan (where we get none), is a shortening of 
• ne + an= not one.  
• Ne an wiht = not one bit

I like “not one whit” or “i give not one whit.”

Wight is a cognate to German Wicht. Bösewicht, Wichtel etc

Somebody says “i dont give a whit” is a thing, too.