ob·nox·ious (ŏb-nŏkshəs, əb-)
1. Very annoying or objectionable; offensive or odious: "I know no method to secure the repeal of bad or obnoxious laws so effective as their stringent execution" (Ulysses S. Grant).
2. Archaic Exposed or subject to harm, injury, or evil: "Those who are most obnoxious to punishment will flee from the country" (George Washington).
3. Archaic Deserving of or liable to censure.
[Latin obnoxiōsus, subordinate, from obnoxius, subject, liable : ob-, to; see OB- + noxa, injury; see nek-1 in the Appendix of Indo-European roots.]
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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.