The wisp of a something that possibly once was there.
I discovered this when working on my https://www.amazon.com/Out-Context-Cross…/dp/B00KFOQIG6 – the 5th category, which was the smallest. What all of the words had in common was hard to pin point until I realized that they had in common a sense of “might-have-been-once-can’t-be-sure”.
“5) Something used to be there;the connection is extremely wispy. [“blushingly” was one of the words on level five, as was “castration” and all the medical terms involving ‘something once there’).”