IPA: /ˈmætrɪˌmoʊni/
KK: /ˈmætrɪmoʊni/
The state of being married or the ceremony that joins two people in marriage.
They celebrated their matrimony with a beautiful wedding ceremony.
Matrimony → It is formed from "mater" (meaning mother) and the suffix "-mony" (indicating a state or condition). The word "matrimony" refers to the state or condition of being a mother, which is traditionally associated with marriage.
Think of 'mother' ('mater') when remembering that 'matrimony' refers to the state of being married, often leading to motherhood.