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Definition: Sensitifrwydd a thrallod emosiynol eithafol a ysgogir gan ganfyddiad bod yr unigolyn wedi cael ei wrthod neu ei feirniadu gan bobl sy'n bwysig iddo neu iddi. Gall hefyd gael ei ysgogi gan ymdeimlad o fethu รข bodloni safonau uchel yr unigolyn ei hun, neu ddisgwyliadau pobl eraill.