chaotic (adj.)youdaoicibaDictYouDict[chaotic 词源字典]
1713, "in a state of primordial chaos," irregularly formed in English from chaos + -ic, probably on model of eros/erotic, demos/demotic, hypnos/hypnotic, etc. Transferred or figurative meaning "confused, disordered" is from 1747.[chaotic etymology, chaotic origin, 英语词源]