The taking of opportunities; especially the practice of seeking immediate advantage from a situation without considering the long term(noun)
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Use "opportunism" in a sentence
"The term opportunism doesn't begin to do justice to the parade of motor mouths who often argue two sides of any and all issues."
"As for what you describe as my opportunism, my hypocrisy, my front-runningness, my herd mentality in aligning with Earth Hour, that's a fiction you're choosing to impose on me."
"For their part, some European policymakers are irked by what they call the opportunism of China's apparent wish to trade some of its vast foreign wealth for increased influence."