deceptively
adv. B2 Upper Intermediate US //dɪˈsɛptɪvɫi// UK //dɪsˈɛptɪvli// de·cep·tive·ly
adv. in a way that hides the true nature of something. You use this when something looks simple or harmless, but it is actually difficult or dangerous.
adv. in a manner that conceals the true nature or difficulty of something. Often used to describe appearances that are misleading or to describe tasks that are more complex than they initially seem.
The path looks easy, but it is deceptively difficult.
The small, quiet cottage was deceptively expensive to maintain because of the high property taxes in the area.
The deceptively simple equation hides a complex set of variables that only a seasoned mathematician can fully unravel without making a single error.
From deceptive + -ly.