中心部: central part or heart, especially of a city

軍船: wind or human-powered warship

歩留まり: (manufacturing) yield rate

舞楽: court dance and music / 武学: military science

to be obsequious

lump, bump (on the body) / knot in a tree / someone in the way / child

渡し船: ferry, ferryboat

武芸: martial arts

成文: (obsolete) starting from the Heian period, an epithet for a person who was assigned to the desired public office, as indicated on their application for office

(mahjong) determining what tile would complete an opponent's hand