bestiality (n.)youdaoicibaDictYouDict[bestiality 词源字典]
late 14c., "the nature of beasts," from bestial + -ity. Meaning "indulgence in beastly instincts" is from 1650s; sense of "sexual activity with a beast" is from 1611 (KJV).[bestiality etymology, bestiality origin, 英语词源]