Connubial
Origin
1650s, from Latin connÅ«biÄlis,
from connÅ«bium ("marriage, wedlock") (variants of cÅnÅ«biÄlis ("pertaining to wedlock"), from cÅnÅ«bium ("marriage, wedlock")) from com- ("together") (English com-) + nÅ«bÅ ("marry, to take as husband") (from which nubile)
Online Etymology Dictionary
from Proto-Indo-European *sneubho- ("to marry, to wed").
Usage notes
Particularly used in fixed phrases, such as “connubial blissâ€, “connubial loveâ€, “connubial relationsâ€, and “connubial bedâ€.