Suffix used in compounds to denote a wedding anniversary, such as 金婚式 (golden wedding anniversary). Not used as a standalone word.
See also: 金婚式
The family gathered to celebrate their parents' golden wedding anniversary.
silver wedding anniversary; 25th wedding anniversary
wooden wedding anniversary; 5th wedding anniversary
paper wedding anniversary; first wedding anniversary
cotton wedding anniversary; second wedding anniversary
straw wedding; second wedding anniversary
golden wedding anniversary; 50th wedding anniversary
bronze wedding; 7th wedding anniversary
tin wedding anniversary; 10th wedding anniversary
crystal wedding; 15th wedding anniversary
coral wedding anniversary; 35th wedding anniversary
pearl wedding anniversary; 30th wedding anniversary
Compound of 婚 (marriage) and 式 (ceremony). The exact historical derivation is uncertain, but it is used as a suffix for wedding anniversaries.