autohypnosis
noun/ˌɔːtəʊhɪpˈnəʊsɪs/
/ˌɔːtəʊhɪpˈnəʊsɪs/
[uncountable]- the practice or fact of hypnotizing yourself
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autohypnosis
Definition of autohypnosis noun from the Oxford Advanced Learner's Dictionary