a sexual relationship between two people in which at least one of them is already committed to someone else
不倫, 浮気
a relationship formed between people or groups based on mutual experiences, ideas, feelings, etc.
絆, 関係
a blood relative who lived a long time ago, usually before one's grandparents
先祖, 祖先
a large family group consisting of parents and children that might also include grandparents, aunts, or uncles
大家族, 拡大家族
a person who takes someone else's child and raises them without legally becoming their parent
養親, フォスターペアレント
either of two children or animals born from the same mother at the same time who are very similar in appearance
一卵性双生児, 同胎双子
the son of one's stepfather or stepmother from a previous relationship
義理の兄弟, ステップブラザー
the man that is married to one's parent but is not one's biological father
継父, ステップファーザー
the woman that is married to one's parent but is not one's biological mother
義理の母, 継母
the daughter of one's stepfather or stepmother from a previous relationship
義理の妹, 義姉妹
the state in which a couple decide to live apart while they are still legally married
法的別居, 別居
the act or fact of taking someone's child and growing them up, which has been approved by law
養子縁組
showing a level of love or care that one would only expect a brother to have
兄弟の, 兄弟的な
(of a group of people) having a strong friendly relationship with shared interests
密接に結びついた, 親密な
to take someone's child into one's family and become their legal parent
養子縁組する, 引き取る
to have a secret romantic or sexual relationship with someone other than one's own partner
浮気する, 裏切る
to receive money, property, etc. from someone who has passed away
相続する, 遺産を受け取る
to remain loyal to or supportive of someone, particularly during a hard time
支える, 忠誠を尽くす
to look or act like an older member of the family, especially one's parents
に似ている, を受け継ぐ