drastic

形容词 drastic:

1. forceful and extreme and rigorous

1. Our budget needs drastic revision.
   我们的预算需作重大修改。
2. Drastic measures will have to be taken to restore order.
   为恢复秩序必须采取严厉措施。

dras.tic

adj.（形容词）
Severe or radical in nature; extreme:
严厉或剧烈的；极端的：
例句：
the drastic measure of amputating the entire leg; drastic social change brought about by the French Revolution.
截除整条腿的极端措施；法国革命带来的剧烈的社会变动

Taking effect violently or rapidly:
作用迅速而猛烈的：
例句：
a drastic emetic.
烈性的催化药

来源：
Greek drastikos [active]
希腊语 drastikos [活跃的]
from drastos [to be done]
源自 drastos [被做]
from dran [to do]
源自 dran [做]

【引伸】
dras.tically
adv.（副词）