This is the 1499th most frequent Japanese word.
しん
The Japanese word "しん" can mean various things depending on context, including "core," "truth," "new," or "heart/spirit."
Here, '芯' (しん) means 'core' or 'lead', referring to the component inside a mechanical pencil or pen.
このペンの芯は細いです。
The core of this pen is thin.
In this case, 'シーン' (しん) means 'scene', a borrowed English term used in Japanese.
彼は映画のシーンで感動しました。
He was moved by the scene in the movie.
Here, '真' (しん) represents 'truth', referring to the authentic or essential aspect of something.