1. Extreme in effect; severe or radical: the drastic measure of amputating the entire leg; drastic social change brought about by the French Revolution.
2. Acting rapidly or violently: a drastic emetic.
[Greek drastikos, active, from drastos, to be done, from drān, to do.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.