frivolousness

词形变化：

副词: frivolously | 名词: frivolousness |

同义词：

silly | shallow | trivial | foolish | unimportant | light | inane | flippant | headlong | criminal | aimless | flighty | dizzy | frolicsome | giddy | idle | inconsequential | lighthearted | perky | playful | vain |

反义词：

serious |