极深研几 Save Sign in to save words Traditional (Taiwan): 極深研幾 jíshēnyánjǐ ㄐㄧˊ ㄕㄣ ㄧㄢˊ ㄐㄧˇ deep and detailed investigation (idiom) Character by character 极(jí)extremely 深(shēn)deep 研(yán)grind 几(jǐ)how many A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0