成婚|せいこんseikon[0]heiban (flat)

1. nounmarriage; wedding

• Synonym結婚けっこんNeutralThe all-purpose everyday word for marrying; 「成婚」 is more written, used in matchmaking-agency and royal-wedding reports, and centers on the marriage being concluded.
• Synonym婚姻こんいんWrittenWritten, legal term for marriage as an institution or relationship, as in 「婚姻届」; it does not refer to the celebratory event.
• Synonym嫁入りよめいりNeutralA woman's marrying into her husband's family; colloquial with a traditional flavor, it views the event from the bride's side.
• Synonym妻帯さいたいWrittenWritten word for a man taking a wife, as in 「妻帯者」; it looks at marriage from the man's side.
• Synonym輿入れこしいれWrittenWritten word for a bride marrying into her husband's family; traditional in flavor but still used. 「成婚」 is about the marriage being concluded.
• Related縁結びえんむすびNeutralForming a match or fated tie, as in 「縁結びの神」; the emphasis is on the bond itself, not the marriage being concluded.
• Related婚儀こんぎFormalFormal, written word for the wedding ceremony; rare — 「婚礼」 is the usual choice.
• Related結婚式けっこんしきNeutralThe everyday word for the wedding ceremony itself; 「成婚」 refers to the marriage being concluded, not the event.
• Related婚礼こんれいWrittenWritten and rather formal word for the wedding ceremony, as in 「婚礼衣装」; the focus is on the rite itself.
• Related既婚きこんNeutralRefers to being married, as in 「既婚者」; it describes the status, not the act of getting married.
• RelatedウェディングNeutralLoanword for a wedding, used mostly in compounds such as 「ウェディングドレス」.
• Related縁定めえんさだめWrittenWritten word for settling a marriage agreement; very rare, and the emphasis is on the promise rather than the marriage itself.
• Related華燭の典かしょくのてんFormalFormal, elegant name for a wedding, used mainly in congratulations, as in 「華燭の典を挙げる」.
• Antonym離婚りこんNeutralDivorce, as in 「離婚届」; the opposite of 「成婚」.

For marrying, say 「結婚」. 「成婚」 is written and centers on the marriage being concluded, as in matchmaking-agency and royal-wedding reports (「ご成婚」「成婚率」). For the ceremony, 「結婚式」 or 「ウェディング」; for divorce, 「離婚」. Narrower words: bride's side 「嫁入り」, man's side 「妻帯」, legal 「婚姻」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 婚姻こんいんが成立せいりつすること。