Agnail -

: Soak your finger in warm water for 5 minutes.

: It comes from the Old English word angnægl . Ang- (meaning tight, painful, or vexatious). -nægl (meaning nail, specifically an iron nail or spike). agnail

The term "agnail" is also used in modern to describe microscopic, hook-like structures on surfaces (such as bionic cutting tools or cactus spines) that help with fluid transport or fog collection. Electronic Entertainment Expo 4K | Merriam-Webster : Soak your finger in warm water for 5 minutes

: It originally referred to a corn on the foot, which feels like a "painful nail" being driven into the skin. or vexatious). -nægl (meaning nail