Noah Webster's Dictionary (imp. & p. p.) of Deepen.

Multi-Version Concordance Deepened (2 Occurrences) Psalms 65:10 Its ridges have been filled, Deepened hath been its furrow, With showers Thou dost soften it, Its springing up Thou blessest. (YLT) Isaiah 31:6 Turn back to Him from whom sons of Israel Have deepened apostacy. (YLT)