Example sentences

Ramayana: As demons were known to be disingenuous, Lakshmana suspected that the unusually attractive deer was an illusion created by the demons

Mahabharata: When envious Duryodhana joined ranks with the disingenuous Shakuni, the Kauravas charged down a dark path that ended in their destruction. 

Bhagavad-gita: Our mind can be disingenuous to the extreme, making us embrace as enjoyable things that bring only misery