五月, 5月: May

五時: five o'clock / 誤字: typo

米語: American English

後家: widow / 碁笥: container for go-stones

連語: compound word, collocation

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

団吾: a male given name

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

年号: An era name.