sormenkynsissä
Sormenkynsissä is a Finnish term that translates to "under one's fingernails" or "on the tips of one's fingers" in English. It is often used figuratively to describe a situation where someone has a strong grasp of something, possesses detailed knowledge, or is exceptionally skilled in a particular area. The phrase implies a deep understanding and mastery, as if the subject matter is so ingrained it can be found literally under one's fingernails.
The idiom can also refer to having a specific task or problem persistently on one's mind, to
The literal image evoked by the phrase highlights the idea of something being intimately connected with a