What are the HSK chengyu (idioms)?
HSK6 idioms (from vocab list).  English definitions from CC-CEDICT.



  一丝不苟 (yīsībùgǒu)not one thread loose (idiom); strictly according to the rulesBaike; Jukuu; Yabla


  一举两得 (yījǔliǎngdé)one move, two gains (idiom); two birds with one stoneBaike; Jukuu; Yabla


  一如既往 (yīrújìwǎng)just as in the past (idiom); as beforeBaike; Jukuu; Yabla


  一帆风顺 (yīfānfēngshùn)propitious wind throughout the journey (idiom)Baike; Jukuu; Yabla


  一目了然 (yīmùliǎorán)obvious at a glance (idiom)Baike; Jukuu; Yabla


  不可思议 (bùkěsīyì)inconceivable (idiom); unimaginableBaike; Jukuu; Yabla


  不屑一顾 (bùxièyīgù)to disdain as beneath contempt (idiom)Baike; Jukuu; Yabla


  不择手段 (bùzéshǒuduàn)by fair means or foulBaike; Jukuu; Yabla


  不相上下 (bùxiāngshàngxià)equally matchedBaike; Jukuu; Yabla


  不言而喻 (bùyánéryù)it goes without sayingBaike; Jukuu; Yabla


  与日俱增 (yǔrìjùzēng)to increase steadilyBaike; Jukuu; Yabla


  东张西望 (dōngzhāngxīwàng)to look in all directions (idiom)Baike; Jukuu; Yabla


  丢三落四 (diūsānlàsì)forgetfulBaike; Jukuu; Yabla


  举世瞩目 (jǔshìzhǔmù)to receive worldwide attentionBaike; Jukuu; Yabla


  举足轻重 (jǔzúqīngzhòng)to play a critical role (idiom)Baike; Jukuu; Yabla


  争先恐后 (zhēngxiānkǒnghòu)striving to be first and fearing to be last (idiom); outdoing one anotherBaike; Jukuu; Yabla


  任重道远 (rènzhòngdàoyuǎn)a heavy load and a long roadBaike; Jukuu; Yabla


  众所周知 (zhòngsuǒzhōuzhī)as everyone knows (idiom)Baike; Jukuu; Yabla


  优胜劣汰 (yōushèngliètài)survival of the fittest (idiom)Baike; Jukuu; Yabla


  侃侃而谈 (kǎnkǎnértán)to speak frankly with assuranceBaike; Jukuu; Yabla


  供不应求 (gōngbùyìngqiú)supply does not meet demandBaike; Jukuu; Yabla


  兢兢业业 (jīngjīngyèyè)cautious and conscientiousBaike; Jukuu; Yabla


  全力以赴 (quánlìyǐfù)to do at all costsBaike; Jukuu; Yabla


  兴致勃勃 (xìngzhìbóbó)to become exhilarated (idiom); in high spiritsBaike; Jukuu; Yabla


  兴高采烈 (xìnggāocǎiliè)happy and excited (idiom)Baike; Jukuu; Yabla


  再接再厉 (zàijiēzàilì)to continue the struggle (idiom); to persistBaike; Jukuu; Yabla


  刻不容缓 (kèbùrónghuǎn)to brook no delayBaike; Jukuu; Yabla


  力所能及 (lìsuǒnéngjí)as far as one's capabilities extend (idiom); to the best of one's abilityBaike; Jukuu; Yabla


  千方百计 (qiānfāngbǎijì)lit. thousand ways, a hundred plans (idiom); by every possible meansBaike; Jukuu; Yabla


  半途而废 (bàntú'érfèi)to give up halfway (idiom); leave sth unfinishedBaike; Jukuu; Yabla


  南辕北辙 (nányuánběizhé)to act in a way that defeats one's purpose (idiom)Baike; Jukuu; Yabla


  博大精深 (bódàjīngshēn)wide-ranging and profoundBaike; Jukuu; Yabla


  各抒己见 (gèshūjǐjiàn)everyone gives their own viewBaike; Jukuu; Yabla


  名副其实 (míngfùqíshí)not just in name only, but also in reality (idiom)Baike; Jukuu; Yabla


  后顾之忧 (hòugùzhīyōu)fears of trouble in the rear (idiom); family worries (obstructing freedom of action)Baike; Jukuu; Yabla


  吞吞吐吐 (tūntūntǔtǔ)to hum and haw (idiom); to mumble as if hiding sthBaike; Jukuu; Yabla


  喜闻乐见 (xǐwénlèjiàn)to love to hear and see (idiom)Baike; Jukuu; Yabla


  天伦之乐 (tiānlúnzhīlè)family love and joyBaike; Jukuu; Yabla


  实事求是 (shíshìqiúshì)to seek truth from facts (idiom)Baike; Jukuu; Yabla


  家喻户晓 (jiāyùhùxiǎo)understood by everyone (idiom); well knownBaike; Jukuu; Yabla


  小心翼翼 (xiǎoxīnyìyì)cautious and solemn (idiom); very carefullyBaike; Jukuu; Yabla


  层出不穷 (céngchūbùqióng)more and more emergeBaike; Jukuu; Yabla


  岂有此理 (qǐyǒucǐlǐ)how can this be so? (idiom); preposterousBaike; Jukuu; Yabla


  川流不息 (chuānliúbùxī)the stream flows without stopping (idiom); unending flowBaike; Jukuu; Yabla


  废寝忘食 (fèiqǐnwàngshí)to neglect sleep and forget about food (idiom)Baike; Jukuu; Yabla


  归根到底 (guīgēndàodǐ)after allBaike; Jukuu; Yabla


  当务之急 (dāngwùzhījí)top priority jobBaike; Jukuu; Yabla


  得不偿失 (débùchángshī)the gains do not make up for the losses (idiom)Baike; Jukuu; Yabla


  得天独厚 (détiāndúhòu)blessed by heaven (idiom)Baike; Jukuu; Yabla


  循序渐进 (xúnxùjiànjìn)in sequence, step by step (idiom); to make steady progress incrementallyBaike; Jukuu; Yabla


  心甘情愿 (xīngānqíngyuàn)delighted to (do sth, idiom)Baike; Jukuu; Yabla


  急于求成 (jíyúqiúchéng)anxious for quick results (idiom)Baike; Jukuu; Yabla


  急功近利 (jígōngjìnlì)seeking instant benefit (idiom); shortsighted vision, looking only for fast returnBaike; Jukuu; Yabla


  总而言之 (zǒng'éryánzhī)in shortBaike; Jukuu; Yabla


  恍然大悟 (huǎngrándàwù)to suddenly realizeBaike; Jukuu; Yabla


  恰到好处 (qiàdàohǎochù)it's just perfectBaike; Jukuu; Yabla


  悬崖峭壁 (xuányáqiàobì)sheer cliffs and precipitous rock faces (idiom)Baike; Jukuu; Yabla


  想方设法 (xiǎngfāngshèfǎ)to think up every possible method (idiom); to devise ways and meansBaike; Jukuu; Yabla


  拔苗助长 (bámiáozhùzhǎng)to spoil things through excessive enthusiasm (idiom)Baike; Jukuu; Yabla


  斩钉截铁 (zhǎndīngjiétiě)lit. to chop the nail and slice the iron (idiom)Baike; Jukuu; Yabla


  新陈代谢 (xīnchéndàixiè)metabolism (biology); the new replaces the old (idiom)Baike; Jukuu; Yabla


  无动于衷 (wúdòngyúzhōng)aloofBaike; Jukuu; Yabla


  无微不至 (wúwēibùzhì)in every possible way (idiom); meticulousBaike; Jukuu; Yabla


  无忧无虑 (wúyōuwúlǜ)carefree and without worries (idiom)Baike; Jukuu; Yabla


  无理取闹 (wúlǐqǔnào)to make trouble without reason (idiom); to be deliberately provocativeBaike; Jukuu; Yabla


  无穷无尽 (wúqióngwújìn)endlessBaike; Jukuu; Yabla


  无精打采 (wújīngdǎcǎi)dispirited and downcast (idiom); listlessBaike; Jukuu; Yabla


  无能为力 (wúnéngwéilì)impotent (idiom)Baike; Jukuu; Yabla


  日新月异 (rìxīnyuèyì)daily renewal, monthly change (idiom)Baike; Jukuu; Yabla


  有条不紊 (yǒutiáobùwěn)regular and thorough (idiom); methodically arrangedBaike; Jukuu; Yabla


  朝气蓬勃 (zhāoqìpéngbó)full of youthful energy (idiom); vigorousBaike; Jukuu; Yabla


  根深蒂固 (gēnshēndìgù)deep-rooted (problem etc)Baike; Jukuu; Yabla


  欣欣向荣 (xīnxīnxiàngróng)(idiom) flourishingBaike; Jukuu; Yabla


  津津有味 (jīnjīnyǒuwèi)with keen interest pleasure (idiom); with gustoBaike; Jukuu; Yabla


  深情厚谊 (shēnqínghòuyì)deep friendshipBaike; Jukuu; Yabla


  滔滔不绝 (tāotāobùjué)unceasing torrent (idiom)Baike; Jukuu; Yabla


  潜移默化 (qiányímòhuà)imperceptible influenceBaike; Jukuu; Yabla


  热泪盈眶 (rèlèiyíngkuàng)eyes brimming with tears of excitement (idiom)Baike; Jukuu; Yabla


  爱不释手 (àibùshìshǒu)to love sth too much to part with it (idiom); to fondle admiringlyBaike; Jukuu; Yabla


  物美价廉 (wùměijiàlián)good quality and cheapBaike; Jukuu; Yabla


  狼吞虎咽 (lángtūnhǔyàn)to wolf down one's food (idiom); to devour ravenouslyBaike; Jukuu; Yabla


  理所当然 (lǐsuǒdāngrán)as it should be by rights (idiom)Baike; Jukuu; Yabla


  理直气壮 (lǐzhíqìzhuàng)in the right and self-confident (idiom)Baike; Jukuu; Yabla


  画蛇添足 (huàshétiānzú)lit. draw legs on a snake (idiom); fig. to ruin the effect by adding sth superfluousBaike; Jukuu; Yabla


  相辅相成 (xiāngfǔxiāngchéng)to complement one another (idiom)Baike; Jukuu; Yabla


  知足常乐 (zhīzúchánglè)satisfied with what one has (idiom)Baike; Jukuu; Yabla


  礼尚往来 (lǐshàngwǎnglái)lit. proper behavior is based on reciprocity (idiom)Baike; Jukuu; Yabla


  称心如意 (chènxīnrúyì)after one's heart (idiom); gratifying and satisfactoryBaike; Jukuu; Yabla


  空前绝后 (kōngqiánjuéhòu)unprecedented and never to be duplicatedBaike; Jukuu; Yabla


  竭尽全力 (jiéjìnquánlì)to spare no effort (idiom); to do one's utmostBaike; Jukuu; Yabla


  精打细算 (jīngdǎxìsuàn)meticulous planning and careful accounting (idiom)Baike; Jukuu; Yabla


  精益求精 (jīngyìqiújīng)to perfect sth that is already outstanding (idiom); constantly improvingBaike; Jukuu; Yabla


  络绎不绝 (luòyìbùjué)continuously; in an endless stream (idiom)Baike; Jukuu; Yabla


  统筹兼顾 (tǒngchóujiāngù)an overall plan taking into account all factorsBaike; Jukuu; Yabla


  聚精会神 (jùjīnghuìshén)to concentrate one's attention (idiom)Baike; Jukuu; Yabla


  肆无忌惮 (sìwújìdàn)absolutely unrestrainedBaike; Jukuu; Yabla


  自力更生 (zìlìgēngshēng)regeneration through one's own effort (idiom)Baike; Jukuu; Yabla


  苦尽甘来 (kǔjìngānlái)bitterness finishes, sweetness begins (idiom); the hard times are over, the good times just beginningBaike; Jukuu; Yabla


  莫名其妙 (mòmíngqímiào)(idiom) bafflingBaike; Jukuu; Yabla


  见义勇为 (jiànyìyǒngwéi)to see what is right and act courageously (idiom, from Analects)Baike; Jukuu; Yabla


  见多识广 (jiànduōshìguǎng)experienced and knowledgeable (idiom)Baike; Jukuu; Yabla


  迄今为止 (qìjīnwéizhǐ)so farBaike; Jukuu; Yabla


  迫不及待 (pòbùjídài)impatient (idiom); in a hurryBaike; Jukuu; Yabla


  锦上添花 (jǐnshàngtiānhuā)lit. on brocade, add flowers (idiom); to decorate sth already perfectBaike; Jukuu; Yabla


  锲而不舍 (qiè'érbùshě)to chip away at a task and not abandon it (idiom); to chisel away at sthBaike; Jukuu; Yabla


  难能可贵 (nánnéngkěguì)rare and preciousBaike; Jukuu; Yabla


  雪上加霜 (xuěshàngjiāshuāng)to add hail to snow (idiom); one disaster on top of anotherBaike; Jukuu; Yabla


  风土人情 (fēngtǔrénqíng)local conditions and customs (idiom)Baike; Jukuu; Yabla


  饱经沧桑 (bǎojīngcāngsāng)having lived through many changesBaike; Jukuu; Yabla


  鸦雀无声 (yāquèwúshēng)lit. crow and peacock make no sound; absolute silence (idiom)Baike; Jukuu; Yabla


  齐心协力 (qíxīnxiélì)to work with a common purpose (idiom); to make concerted effortsBaike; Jukuu; Yabla



Not counted: 二氧化碳 (carbon dioxide), 公共汽车 (bus), 名胜古迹 (historical sites), 微不足道 (negligible), 烟花爆竹 (firecrackers), 电子邮件 (email), 高速公路 (expressway), 通货膨胀 (inflation), 飞禽走兽 (birds and animals), 讨价还价 (haggle over price).