míng​sī​kǔ​suǒ

to rack one's brains

Senses

冥思苦索 míng​sī​kǔ​suǒ to rack one's brains

to mull over or think long and hard about a problem; to search deeply for a solution

References

synonym 冥思苦索/冥思苦索 → 冥思苦想/冥思苦想
same_as 冥思苦想/冥思苦想 → 冥思苦索/冥思苦索