Iphigenia's first meeting with her father is couched in double entendre which is devastating: as she talks about her upcoming wedding, he talks about her upcoming sacrifice. They use the same words, but the meanings could not be more horribly apart. When Agamemnon meets with Clytemnestra, he still vainly tries to convince her to return to Argos without witnessing the "wedding."
In their first encounter, Iphigenia and her father employ double entendre, which is profoundly painful: as she speaks about her upcoming marriage, he discusses her sacrifice. They use the same words but convey opposite meanings. Agamemnon's attempt to convince Clytemnestra not to return without witnessing "the wedding" remains unavailing.