antagonism
an·ta·go·nism
noun
1.
a state of deep-seated ill-will
2.
4.
(biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure
Origin
From Ancient Greek ἀνταγωνιστής (antagōnistḗs, “opponent”), from ἀνταγωνίζομαι (antagōnízomai, “antagonize”), from ἀγών (agṓn, “contest”) (English agon).
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.