nài láo
hardy
able to resist hardship
chī kǔ nài láo
hardworking and enduring hardships (idiom)
kè kǔ nài láo
to bear hardships and work hard (idiom); assiduous and long-suffering
hard-working and capable of overcoming adversity
qín jiǎn nài láo
diligent and able to endure hardship (idiom)