The quality or state of being unchaste; lewdness; incontinence.(noun)
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Use "unchastity" in a sentence
"In our present lesson he treats chiefly of two vices: unchastity, which is a sin against oneself and destructive of the fruits of faith; and fraud in business, which is a sin against the neighbor and likewise destructive of faith and charity."
"Hence, one of the conditions the Jerusalem council made for the inclusion of the Gentiles in the Christian Church was that they should abstain from all forms of "unchastity""
""The task of purity," as John Paul II observed, "is not only (and not so much) abstaining from 'unchastity' and from … 'lustful passions'.""