連語: compound word, collocation

後家: widow / 碁笥: container for go-stones

団吾: a male given name

団子: sweet dumplings / 談合: consultation; agreement / 段碁: a ranked level of play in the game of go; a ranked player in the game of go

和語: native Japanese words

事後: post-, after the fact / 爾後: thereafter / 耳語: private talk, whispering / 持碁: game of go ending in a draw

擁護: protection / 用語: term / 養護: nursing / 洋語: Western language / 用後: after use

擁護: protect / 養護: nurse

五段: an abbreviation for 五段活用

A group of onmitsu, government-employed undercover agents, established by the 8th Tokugawa shogun, Tokugawa Yoshimune (1684–1751). Sometimes described as ninja.