casamiento
/kasaˈmjento/ · B2 · noun · m
marriage
💒💍 casa + miento: 'house-making' sounds like a casa-building ceremony
Comes from casar (to marry), which comes from casa (house): marrying meant setting up a house together. The suffix -miento marks the act or result, so casamiento = the act of 'housing' two people as a couple.