jiān​kǔ​zhuó​jué

extraordinarily arduous

Senses

艰苦卓绝/ 艱苦卓絕 jiān​kǔ​zhuó​jué extraordinarily arduous

extremely difficult and grueling; used to describe a struggle or task that is exceptionally hard and surpasses all others

References

synonym 艰苦卓绝/艱苦卓絕 坚苦卓绝/堅苦卓絕
see 坚苦卓绝/堅苦卓絕 艰苦卓绝/艱苦卓絕