Word

HSK	Not in HSK
FREQUENCY	Unknown

钻坚仰高 zuān jiān yǎng gāo

lit. looking up to it, it gets higher; boring into it, it gets harder (idiom) (from Analects)
fig. to delve deeply into one's studies
meticulous and diligent study

钻 zuān HSK 6	drill, bore; pierce; diamond
坚 jiān HSK 4	hard, strong, firm; resolute
仰 yǎng HSK 6	raise the head to look; look up to, rely on, admire
高 gāo HSK 1	high, tall; lofty, elevated