For Lilian Yates to call the parking attendants ' behavior ' disgusting ' is disingenuous in the extreme.

This is, of course, disingenuous to say the least.

It would be disingenuous to imply that such funds would solve the problem in education.

However, the Government were slightly disingenuous in saying, " All of this is happening anyway under these various other Acts.

Don't you think you are being just a little disingenuous?

You have to be pretty thick not to see through all this - or extremely disingenuous.

His apology seemed disingenuous, lacking sincerity or truthfulness.

No.

"Ingenous" means innocent or naive, while "disingenuous" means not candid or sincere, often with an intent to deceive. So, ingenuous refers to being straightforward and honest, whereas disingenuous refers to being deceitful or insincere.