汽船
きせん · kisen · JLPT N1 · noun
steamer
🚢 汽 = steam, 船 = ship: steam + ship = きせん (kisen), a steamship
汽 (ki) means steam and 船 (sen) means ship. Together they name a ship powered by a steam engine, the same two parts as 汽車 (kisha), steam train.
船 — boat radical 舟 + 㕣 (phonetic)
船 is a semantic-phonetic compound. The left side 舟 depicts a boat and gives the meaning, while the right side 㕣 originally suggested the sound. Together they refer to a ship or vessel, a meaning that has stayed stable since early seal script.