de·lude 
/dɪˈlu:d/ verb
de·ludes; de·lud·ed; de·lud·ing /dɪˈlu:d/ verb [+ obj] : to cause (someone) to believe something that is not true
▪ If she thinks I care, she's deluding [=fooling] herself. ▪ He was deluded [=deceived] by their lies. — often + into ▪ They deluded themselves into believing their team would win.
▪ If she thinks I care, she's deluding [=fooling] herself. ▪ He was deluded [=deceived] by their lies. — often + into ▪ They deluded themselves into believing their team would win.
— deluded adjective [more deluded; most deluded]
▪ His deluded family believed everything he said. ▪ a very deluded way of thinking
▪ His deluded family believed everything he said. ▪ a very deluded way of thinking
