相关单词近义词 carefree 无忧无虑的, cheerful 高兴的, optimistic 乐观的, easygoing 随和的, lighthearted 心情愉快的, nonchalant 若无其事的, blithe 快乐的, devil-may-care 不顾一切的, slaphappy 头晕目眩的, harum-scarum 冒失的, freewheeling 无约束的临近词happy, happy face相似词happy hour, happy medium, happy slapping, happy-clappy, haptic, hara-kiri, harangue, harass, 返回 happy-go-lucky