c.1200, "a married woman in relation to her husband" (also of men), from O.Fr. spus
), from L. sponsus
"bridegroom" (fem. sponsa
"bride"), from masc. and fem. pp. of spondere
"to bind oneself, promise solemnly," from PIE *spend-
"to make an offering, perform a rite" (see spondee
(early 13c.) was an old name for "adultery."