Impressed adverbs are provided in this article. The words listed here are commonly found along with the verb impressed in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb IMPRESSED.
actually, agreeably, apparently, awfully, carefully, certainly, chiefly, clearly, completely, considerably, constantly, continually, deeply, definitely, disagreeably, distinctly, duly
early, earnestly, easily, enormously, equally, especially, evidently, extremely, faintly, favorably, favourably, firmly, forcibly, frequently, fully, generally, genuinely
gradually, greatly, hardly, highly, hugely, immediately, immensely, increasingly, incredibly, indelibly, initially, instantly, irresistibly, mightily, mildly, naturally, obviously
originally, overly, painfully, particularly, permanently, plainly, pleasantly, powerfully, previously, probably, profoundly, properly, quickly, readily, really, religiously, repeatedly
sensibly, seriously, similarly, simultaneously, sincerely, slightly, solemnly, specially, strangely, strongly, suddenly, sufficiently, suitably, terribly, thoroughly, totally, tremendously
truly, unconsciously, undoubtedly, unduly, unfavorably, unfavourably, usually, vaguely, vastly, visibly, vividly, wonderfully
Hope this word list had the impressed adverb you were looking for. In addition to adverbs used with impressed, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.