espouse (v.)youdaoicibaDictYouDict[espouse 词源字典]
mid-15c., "to take as spouse, marry," from Old French espouser "marry, take in marriage, join in marriage" (11c., Modern French épouser), from Latin sponsare, past participle of spondere "make an offering, perform a rite, promise secretly," hence "to engage oneself by ritual act" (see spondee). Extended sense of "adopt, embrace" a cause, party, etc., is from 1620s. Related: Espoused; espouses; espousing. For initial e-, see e-.[espouse etymology, espouse origin, 英语词源]
spousal (n.)youdaoicibaDictYouDict
c. 1300, "a wedding ceremony, action of marrying; wedlock, condition of being espoused," from Anglo-French spousaille, Old French esposaille (see espousal). Earlier was spousage "marriage, wedlock" (mid-14c.).