坳陷 Traditional form: 坳陷 Pinyin (reading): àoxiàn Definitions: (geology) depression low-lying area Characters: 坳 - cavity, depression, hollow; depressed; undulating 陷 - to sink, to plunge; trap, pitfall Traditional characters: 坳 - cavity, depression, hollow; depressed; undulating 陷 - to sink, to plunge; trap, pitfall