futile

词形变化：

副词: futilely | 名词: futileness |

同义词：

vain | useless | ineffective | unsuccessful | fruitless | ineffectual | bootless | abortive | null | hopeless | idle | aimless | worthless | negative | pointless | wasted | unavailing | sleeveless | otiose |

反义词：

profitable | useful |

词义辨析：

同义:

a.无益的; 无效的

useless

bootless

vain

unsuccessful

ineffective

fruitless

同义参见:

idle

null

negative

ineffectual

hopeless

worthless

aimless

abortive

反义:

a.无益的; 无用的

useful

profitable

beneficial