momentous

词形变化：

副词: momentously | 名词: momentousness |

同义词：

transient | fleeting | temporary | quick | brief | short | short-lived | transitory | passing | ephemeral | immediate | instant | abrupt | instantaneous | sudden | evanescent | impermanent | slippery | flying | mushroom | momentous | fugitive | momentaneous |

反义词：

agelong |

词义辨析：

同义:

a.重大的; 重要的

important

great

outstanding

considerable

eventful

stirring

influential

powerful

effective

同义参见:

significant

serious

fated

consequential

signal