| brainwashing | (noun) forcible indoctrination into a new set of attitudes and beliefs | - |
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| brainwave | (noun) the clear (and often sudden) understanding of a complex situation | Synonyms: brainstorm, insight |
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| (noun) (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph | Synonyms: brain wave, cortical potential |
| inwardness | (noun) the quality or state of being inward or internal | - |
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| (noun) preoccupation with what concerns human inner nature (especially ethical or ideological values) | Synonyms: internality |
| (noun) preoccupation especially with one's attitudes and ethical or ideological values | - |
| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: center, centre, core, essence, gist, heart, heart and soul, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| rainwater | (noun) drops of fresh water that fall as precipitation from clouds | Synonyms: rain |
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| tinware | (noun) articles of commerce made of tin plate | - |
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