艰巨jiānjùTop 15000Meanings1. (of a task, mission or responsibility) extremely difficult; challenging; demandingCharacters used艰difficult巨largeExamples1我wǒ老板lǎobǎn把bǎ艰巨jiānjù的de任务rènwu指派zhǐpài给gěi了le我wǒ。My boss assigned the hard job to me.