This is the 4619th most frequent Japanese word.
成婚
"成婚" means "marriage" or "completion of a marriage."
The word '成婚' is used here to refer to the achievement or result of marrying.
彼らの成婚は家族にとって大きな喜びでした。
Their marriage was a great joy for their family.
In this sentence, '成婚' describes the act of marriage as formalized through a ritual or ceremony.
成婚の儀式は伝統的な形式に従って行われました。
The marriage ceremony was carried out according to traditional customs.
Here, '成婚' conveys the completion of the process of marriage, leading to the start of a new life together.