宣 (Kanji for announce)

Onyomi

SEN

She was SENDing an announcement that her husband had just been crowned king. . . of Latveria!

宣伝(せんでん)

propaganda ★★☆☆☆
宣 (announce) + 伝 (transmit) = 宣伝 (propaganda)

propaganda, or announcement

宣言(せんげん) する

proclaim ★☆☆☆☆ NP
宣 (announce) + 言 (say) = 宣言 (proclaim)

宣戦(せんせん)

declaration of war. ☆☆☆☆☆
宣 (announce) + 戦 (fight) = 宣戦 (declaration of war.)