无忧无虑 Origin — Chinese Character Wiki

wúyōuwúlǜ HSK7

carefree

无無 wú adjectiveverb

to not have

to not have; there is no; lack; (as prefix) non-; un-; -less
忧憂 yōu nounadjective

worry

anxiety; care; a source of concern or trouble
无無 wú adjectiveverb

to not have

to not have; there is no; lack; (as prefix) non-; un-; -less
虑慮 lǜ nounadjective

to worry

(bound form) to be anxious; to worry about; to have concerns