intransitive verb
self-de·​ceive | \ˌself-di-ˈsēv \
self-deceived; self-deceiving; self-deceives

Definition of self-deceive 

: to deceive oneself especially concerning oneself Faced with the choice between attributing their performance to the presence of the answers or their own ability, people chose to self-deceive, convincing themselves that their performance was due not to the answers but to themselves.— Zoë Chance et al.

Other Words from self-deceive

self-deceived adjective
One of her [Jane Austen's] novels, Emma, is narrated so much through the consciousness of its self-deceived heroine that the reader too keeps being deceived. — John Mullan We are all invited … to change or to retrench and double down on the self-deceived notion that we have things all figured out. — Tim Suttle
self-deceiving adjective
self-deceiving people/beliefs
self-deceiver noun, plural self-deceivers
Self-deceivers are people who don't see their own values, motives and beliefs clearly. — Robert Lynch

First Known Use of self-deceive

1617, in the meaning defined above

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The first known use of self-deceive was in 1617

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