宣伝
せんでん · senden · JLPT N3 · noun
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📢 宣伝 = proclaim + transmit; senden sounds like send-in, sending word out
宣 means to proclaim or announce, as in 宣言 (declaration). 伝 means to pass along, as in 伝える (to convey). Announcing something and passing it on to as many people as possible is publicity.