复 杂 fù zá complicated / complex 曲 折 qū zhé winding / (fig.) complicated 疑 难 yí nán hard to understand / difficult to deal with / knotty / complicated 繁 复 fán fù complicated 庞 杂 páng zá complex / complicated / many and varied 错 综 cuò zōng intricate / complicated / tangled / involved / to synthesize 艰 深 jiān shēn abstruse / complicated 繁 complicated / many / in great numbers / abbr. for 繁體|繁体[fan2 ti3], traditional form of Chinese characters 简 单 jiǎn dān simple / not complicated 不 简 单 bù jiǎn dān not simple / rather complicated / remarkable / marvelous 繁 琐 fán suǒ many and complicated / mired in minor details 并 发 bìng fā to happen simultaneously / (medicine) (of one disease) to be complicated by (another) / (of another disease) to erupt simultaneously / (computing) concurrent 错 综 复 杂 cuò zōng fù zá tangled and complicated (idiom) 深 入 浅 出 shēn rù qiǎn chū to explain a complicated subject matter in simple terms (idiom) / (of language) simple and easy to understand 纷 繁 fēn fán numerous and complicated 复 杂 化 fù zá huà to complicate / to become complicated 故 弄 玄 虚 gù nòng xuán xū deliberately mystifying / to make sth unnecessarily complicated 繁 简 fán jiǎn complicated and simple / traditional and simplified form of Chinese characters 说 来 话 长 shuō lái huà cháng start explaining and it's a long story (idiom) / complicated and not easy to express succinctly 千 头 万 绪 qiān tóu wàn xù plethora of things to tackle / multitude of loose ends / very complicated / chaotic 羊 肠 小 道 yáng cháng xiǎo dào road as twisty as sheep's intestine (idiom) / narrow and winding road / fig. complicated and tricky job 盘 根 错 节 pán gēn cuò jié twisted roots and intertwined joints (idiom) / complicated and very tricky / knotty and deeply-rooted difficulties 二 十 四 史 Er4 shí sì Shǐ the Twenty-Four Histories (25 or 26 in modern editions), collection of books on Chinese dynastic history from 3000 BC till 17th century / fig. a long and complicated story 轇 complicated, confused / dispute 一 言 难 尽 yī yán nán jìn hard to explain in a few words (idiom) / complicated and not easy to express succinctly 大 题 小 作 dà tí xiǎo zuò to cut a long story short / a brief treatment of a complicated subject / fig. to treat an important question as a minor matter 旬 输 月 送 xún shū yuè sòng pay every ten days, give tribute every month (idiom) / incessant and ever more complicated demands 迂 回 曲 折 yū huí qū zhé meandering and circuitous (idiom) / complicated developments that never get anywhere / going around in circles 烦 冗 fán rǒng diverse and complicated (of one's affairs) / prolix (of speech, writing etc) 脱 裤 子 放 屁 tuō kù zi fàng pì lit. to take off trousers to fart / fig. to do something absolutely unnecessary / fig. to make things too complicated 七 弯 八 拐 qī wān - bā guǎi (idiom) twisting and turning / (idiom) tricky and complicated 
fán