antagonistic
an·tag·o·nis·tic
adj \(ˌ)an-ˌtag-ə-ˈnis-tik\Definition of ANTAGONISTIC
1
: characterized by or resulting from antagonism <antagonistic antibiotics>
2
: relating to or being muscles that are antagonists <skeletal muscles arranged in antagonistic pairs>
—an·tag·o·nis·ti·cal·ly \-ti-k(ə-)lē\ (audio pronunciation) adverb
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