Ingenuously is how an ingenuous person speaks or acts: simply, honestly, and with trust, often because they have not yet learned to be careful. He ingenuously admitted he had never used the software. She asked, ingenuously, why adults say one thing and do another. The adverb does not mean “cleverly.” That is ingeniously, from ingenious, and it is the trap this whole family sets. Ingenuously can sound almost childlike, or bravely plain; it is not slang, and it is not an insult by itself, though a sharp listener may hear “they have not seen enough of the world yet.” Use it when the honesty is unguarded, not when you mean a smart trick.

天真地；率直地（不是「巧妙地」；那是 ingeniously）