a conversation marked by the intimate informality of a small group sitting around a fire
炉端でする四方山話 - EDR日英対訳辞書
It is a prefix to indicate informality.
他の語に冠して用いる、本式でないもののことを指す語。 - Wikipedia日英京都関連文書対訳コーパス
It seems that there had been some informality about their license, that the clergyman absolutely refused to marry them without a witness of some sort,
証明書に何かしら不備でもあったのだろう、牧師は立会人なしでは結婚を認めぬと。 - Arthur Conan Doyle『ボヘミアの醜聞』
In the diary of FUJIWARA no Teika, "Meigetsuki," there is a description of him setting Sugiita-shoji (Sugi-shoji) on which a picture was executed in the section of the year of 1227, and that he was going to set sugi-yarido (yarido made with cedar) instead of plastering a wall in the west side of the tsumado informality in section of the year of 1230.
藤原定家の日記『明月記』嘉禄三年(1227年)の条に、杉板障子に画を描きお終わったので立てたとあり、寛喜二年(1230年)の条には、妻戸西は略儀によって壁を塗らず代わりに杉遣戸を立てるつもりである、とある。 - Wikipedia日英京都関連文書対訳コーパス
It seems that there had been some informality about their license, that the clergyman absolutely refused to marry them without a witness of some sort, and that my lucky appearance saved the bridegroom from having to sally out into the streets in search of a best man.
どうやら彼らの許可証に多少略式のところがあり、牧師が誰か立会人なしには彼らの結婚式を行うことをきっぱりと断り、そこへ幸運にも僕が現れて花婿が付添い人を探しに街へ打って出なければならないところを救ったということらしい。 - Arthur Conan Doyle『シャーロック・ホームズの冒険』