IPA: /ˈɪnəsəntli/
KK: /ɪnəˈsɛntli/
In a way that shows a lack of guilt or wrongdoing; without any intention to harm or deceive.
She smiled innocently, not realizing the trouble she had caused.
Innocently → It is formed from "innocent" (from Latin "innocens", meaning not harmful or not guilty) and "-ly" (a suffix used to form adverbs). The word "innocently" means in a manner that is not harmful or without guilt.
Think of being 'not guilty' ('innocent') and how the '-ly' turns that into a way of acting. So, when someone acts innocently, they are acting in a way that is not harmful.