闵 is primarily known as a surname (e.g., 闵子骞, a disciple of Confucius). As a literary word it means to feel pity or sorrow, but this sense is rarely used in modern Chinese.
门 on the outside is the gate radical, simplified from a two-leaf swinging-door pictograph. It encloses the inner element and groups 闵 with 闭 (close), 间 (interval), and 闷 (stifle) — words centered on what happens at or behind a doorway.
文 inside the gate supplies the reading, drifting from wén to mǐn along an old labial alternation. The same phonetic surfaces in 纹 (vein), 蚊 (mosquito), and 紊 (disorderly). As a surname today 闵 anchors on its bearer rather than transparent meaning.