The kanji 主 primarily conveys the idea of "master," "lord," "chief," or "main." It implies a position of authority, control, or importance. It can also signify the core element or the essential aspect of something.

・On-yomi (音読み): しゅ (shu) ・Kun-yomi (訓読み): ぬし (nushi), あるじ (aruji)

⚫︎ 主人（しゅじん） Translation: Master; husband ⚫︎ 主な（おもな） Translation: Main; chief; principal ⚫︎ 民主主義（みんしゅしゅぎ） Translation: Democracy (lit. people-主-ism)

The kanji 主 is a pictograph. It depicts a lit torch or candle. This symbolizes the person who holds the flame, the one who is in charge or the "master" of a situation. The light from the torch also suggests something essential or the main part, linking to the meaning of "chief" or "main." The character evolved over time, becoming more stylized but retaining the core representation of a flame or light source held up high.