요인要因 factor; cause 원인原因 cause; reason 인연因緣 relationship; connection 패인敗因 cause of defeat; cause of failure 동인動因 motive 변인變因 variable 사인死因 cause of death 인과因果 cause and effect 인과응보因果應報 karma; poetic justice; retributive justice 인습因習 convention; old custom 인습적因襲的 being conventional 인습적因襲的 conventional 주요인主要因 major factor; key factor 주원인主原因 main cause