慾ㄩˋyù壑ㄏㄨㄛˋhuò難ㄋㄢˊnán填ㄊㄧㄢˊtián

  1. 形容貪慾如同深谷一樣，永遠難以滿足。如：「人心若貪念不止，要知慾壑難填，將永陷痛苦深淵之中。」

英bottomless pit of desire (idiom)​; insatiable greed, carnal cravings are never satisfied and are a main obstruction on the path to enlightenment
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