Is it ensure, insure, or assure?
c.1600, "tearful," from Middle English fem. proper name Maudelen (early 14c.), from Magdalene (Old French Madelaine), woman's name, originally surname of Mary the repentant sinner forgiven by Jesus in Luke vii:37 (see Magdalene). In paintings, she often was shown weeping as a sign of repentance. Meaning "characterized by tearful sentimentality" is recorded by 1630s.