Without worry without anxiety
Complete free of worries or concerns
Positive
人们常常说,童年时代的生活无忧无虑,令人怀念 | Rénmen chángcháng shuō, tóngnián shídài de shēnghuó wúyōuwúlǜ, lìng rén huáiniàn
It's often said that people are nostalgic for their worry-free childhoods
[Source]
我们无忧无虑地度了三个星期的假 | Wǒmen wúyōuwúlǜ de dù le sān gè xīngqi de jiǎ
We enjoyed a carefree three-week vacation
[Source]
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This is an HSK chengyu
《忍字记》(Rěn Zì Jì), a work by 郑廷玉 (Zhèng Tíng Yù) of the Yuán Dynasty (元, 1206 - 1368)
This chengyu is from a line in the work listed in the "Origin" section above