The kanji 宣 primarily conveys the idea of "to declare," "to announce," or "to proclaim." It suggests making something known publicly or officially, often with authority or formality. The character implies a statement or message that is intended to be heard and understood by others.

・On-yomi (音読み): セン ・Kun-yomi (訓読み): の（べる） (no(beru))

⚫︎宣言（せんげん） Translation: Declaration; proclamation ⚫︎宣伝（せんでん） Translation: Advertisement; publicity; promotion ⚫︎宣布（せんぷ） Translation: Announcement; declaration

The kanji 宣 is a phono-semantic compound (形声文字; けいせいもじ). The semantic component is 宀(roof/house), indicating a place. The phonetic component is 亘 (わたる; wataru), which originally meant "to span," "to extend". Combining these elements, 宣 initially represented the idea of “to speak broadly within a space,” which evolved into "to declare" or "to announce" to a wider audience. The element under the roof suggests that the declaration is made from a specific location or from a position of authority.