Not a word but a sentence.

1. The social institution under which a man and woman establish their decision to live as husband and wife by legal commitments, religious ceremonies, etc.
2. The state, condition, or relationship of being married; wedlock; such as, a happy marriage.
3. The legal or religious ceremony that formalizes the decision of a man and woman to live as husband and wife, including the accompanying social festivities.
4. A relationship in which two people have pledged themselves to each other in the manner of a husband and wife, without legal sanction: trial marriage.
5. Any close or intimate association or union: the marriage of words and music in a hit song.
6. A formal agreement between two companies or enterprises to combine operations, resources, etc., for mutual benefit; a merger.
7. A blending or matching of different elements or components: "The new hand cream is a beautiful marriage of fragrance and texture."

Greek: Hymen (god)
Latin: (no equivalent)

Pitching and tossing on the sea of matrimony: marriage quotes.

A marriage in which little or no love-making activity occurs between two spouses: There are some married couples who have celibate marriages because they have different work schedules, have demanding and busy lives, as a result of old age, or for a variety of other reasons.

A feature of a Catholic celibate marriage, or Josephite marriage, is the agreement to abstain from participating in intimate activities as a mutual decision.

Sometimes, celibate marriages, or "spiritual marriages", may also take place later in life after raising a family so the couple can fully dedicate themselves to serving the humanitarian objectives of their church.

A wedding ceremony that is performed by someone who is not a minister or priest: The mayor of the town has officiated at many civil marriages during his time in office.

Civil marriages are performed, with dignity, as a civil contract without a religious ceremony.

Cousin to cousin marriage or marriages as practiced by some groups of people around the world.

Native Qataris, who number about 250,000 in nation of 1.6 million, are suffering serious health problems that relate directly to a privileged lifestyle paid for with the nation's oil wealth, as well as a determination to hold on to social traditions, like having young people marry their cousins.

While embracing modern conveniences, Qataris have also struggled to protect their cultural identity from the forces of globalization. For many, that has included continuing the practice of marrying within families, even when it predictably produces genetic disorders; such as, blindness and various mental disabilities.

The March of Dimes Foundation, an American charity that focuses on trying to wipe out birth defects, listed Qatar as 16th globally for the incidence of birth defects per 1,000 live birth.

According to some experts, the chief cause of the problem in Qatar is consanguineous marriages. Saudi Arabia ranked second in the world.

In populations where marriage within kin groups is common, both first cousin marriages and intra-group marriages carry an added risk of infant and child mortality.