Short answers, pulled from the story.
The word husband derives from Old Norse hūsbōndi, combining hūs (house) and bōndi, from the verb būa meaning to dwell, making its literal sense a householder. The term passed through Old English as hūsbōnda and then into Middle English as huseband.
A groom is a male participant in a wedding ceremony, while a husband is what the man is called after the ceremony for the full duration of the marriage. The title of husband ends upon divorce, when he becomes an ex-husband, or upon the death of the spouse, when he is called a widower.
In Islamic marital jurisprudence, a husband is considered a protector of the household and of his wife, with distinct rights and obligations in legal and economic matters. Islam limits polygamy to four wives, provided the husband can treat each justly, and requires a man to have a valid reason and his existing wife's unpressured consent before marrying again.
Before the Meiji Civil Code of 1898, a woman's property in Japan, including land and money, passed to her husband upon marriage. Only personal clothing and a mirror stand remained her own.
A dowry was property given, often by the bride's family, at the time of marriage to help establish a new household. If the husband committed grave offences against his wife, he was obligated to return the dowry to her or to her family.
In the Philippines, a wife can be charged with adultery for a single act of sexual intercourse with someone other than her husband. A husband faces the separate and more loosely defined charge of concubinage, which requires keeping a mistress in the family home, cohabiting with her, or maintaining a relationship under scandalous circumstances.