"Controvert" is a verb; "extrovert" is usually a noun, although it could sensibly be a verb describing the behavior of some microorganisms.
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oppose, controvert, contradict
Introvert.
The part of speech that the word my is used as is an adjective.
A suffix changes a word's part of speech. For example, the word 'happy' is an adjective. But when you add a suffix, which is an ending, it can change the part of speech. Happily is an adverb. Happiness is a noun.
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