unexpectedly

词形变化：

副词: unexpectedly | 名词: unexpectedness |

同义词：

unforeseen | sudden | accidental | chance | unanticipated | surprising | contingent | amazing | abrupt | impetuous | curt | headlong | casual | startling | astonishing | out of the blue |

反义词：

expected | usual |

词义辨析：

同义参见:

suddenly

headlong