When someone takes something that does not belong to them, it is known as appropriating. However, when it is done in an unsuitable manner or without permission, it becomes inappropriate. The following are some expressions that can be used instead of "appropriated inappropriately" to convey the same meaning: wrongly appropriated, misappropriated, illegally seized, unduly acquired, embezzled, stolen, deceitfully obtained, dishonestly taken, improperly taken, or fraudulently acquired. These synonyms showcase the severity of the action and can be utilized in various contexts. The key is to choose the most suitable phrase that fits the situation.