Answer: iching

AnswerCrossword Clue
ICHINGTraditional coin-toss reference
ichingICH, to eke (to augment, also ECH, ECHE, EECH, EIK, ICH)
ICHINGAncient Chinese book of divination
ICHINGAncient manual of divination
ICHINGSource of the quote "Change is certain"
ICHINGTimeless yearning for old philosophical text (1,5)
ICHINGBook of hexagrams
ICHINGChinese book of divination
ICHING"Book of Changes"
ICHINGAncient Chinese divination book
ICHINGBook of divination
ICHINGSource of four symbols on the South Korean flag
ICHINGRelic of the Han Dynasty
ICHINGDivination book
ICHINGChinese divination book
ICHINGAncient Chinese divination text
ICHINGChinese book of augury
ICHINGChinese philosophy book
ICHINGConfucian text known as the "Book of Changes"
ICHINGBook of Changes