Sentence:  The account of the loss of the blessing of his father Isaac appears immediately after Esau's <WSD>marriage</WSD> to his Hittite wives. 
Meaning of the word marked with <WSD> tags:  A union of two or more people that creates a family tie and carries legal, social, and/or religious rights and responsibilities. (from 14th c.<ref name="etymonline"></ref>)