The word 'activeness' is correct and usable in written English. You can use it to describe someone or something that is actively engaged in a situation or activity. For example, "The activeness of the participants was impressive.".
Might the actish feel of some occurrence itself constitute that event's activeness, or the agent's exercise of active control?
Such a book, however much it attends to women's activeness, is also about women's attractiveness.
Now we can share and compete over our activeness, our sleep quality or the healthiness of our meals.
As for the others, there is a sluggishness and lack of movement to them that stands in odd counterpoint to the activeness of the walls.
The movement of the military's base from Abuja to Maiduguri shows pro-activeness, his willingness to take the war to the terrorists".
This pro-activeness has been evident at the stadium, too, where the players' lounge has been relocated, now being partly used as a warm-up area and media interview room.
This a kind of mutual activeness is the real joy of fandom in the LeBron Era: James is a rich text, a better subject for exegesis, for a kind of participatory reading, than any player before him.
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Cristina Valenza
Retail Lead Linguist @ Apple Inc.