Word

HSK	Not in HSK
FREQUENCY	Unknown

腦洞大開 nǎo dòng dà kāi

DEFINITIONS

imaginative
to have one's mind buzzing with ideas

CHARACTERS

腦 nǎo	brain
洞 dòng HSK 5	cave, grotto; ravine; hole
大 dà HSK 1	big, great, vast, large, high
開 kāi	open; initiate, begin, start