Job 6:30

Is there iniquity in my tongue? -This is a solemn appeal to their consciences, and their own deep conviction that he was sincere. Iniquity in the tongue means falsehood, deceit, hypocrisy - that which would be expressed by the tongue. Cannot my taste discern perverse things? -Margin, palate. The word used hereחךchêkmeans properly the palate, together with the corresponding lower part of the mouth, the inside mouth. Gesenius. Hence, it means the organ of taste, residing in the mouth.