高枕無憂

to sleep peacefully (idiom) / (fig.) to rest easy / to be free of worries

surname Gao

high / tall / above average / loud / your (honorific)

pillow / to pillow / to rest one's head on (Taiwan pr. [zhen4] for this sense)

not to have / no / none / not / to lack / un- / -less

to worry / to concern oneself with / worried / anxiety / sorrow / (literary) to observe mourning