casar

To marry someone (as the officiant: el juez los casó, the judge married them) or, reflexively, casarse, to get married: se casaron el año pasado. It also means to match or fit together well outside the wedding sense: esos colores no casan bien (those colors don't go together well).

• Se casaron en una playa de México. — They got married on a beach in Mexico.
• El cura los casó ante toda la familia. — The priest married them in front of the whole family.
• Ese vino casa muy bien con el queso. — That wine pairs very well with the cheese.

Casar without the reflexive pronoun means 'to marry someone off' or 'to officiate a marriage,' not 'to get married' — a learner who wants to say 'I'm getting married' needs the reflexive: me caso, not simply caso.

• song Yo no me caso, compadre — A well-known traditional Mexican polka, often credited to Sebastián Curiel and widely recorded (including by Luis Aguilar), about a bachelor who insists he won't marry because life is too much fun as it is.