Do I need a comma in the phrase: monotone, monotonous, repetitive actions?

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In this case, of course, possible to argue about whether the definitions were uniform. In my opinion, they characterize the object ("actions") with a few different sides - say about the method and frequency of performing actions. When viewed from this perspective, a comma between the adjectives is not needed. If to bring both features to the concept of qualitative adjectives, as well as to draw attention to the awkwardness of the whole thing, you will certainly want to break her punctuation and intonation. It is possible to do, thanks to this compromise concept of "copyright sign".
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