IPA: /ˈwɪn.sə.mli/
KK: /ˈwɪn.sə.mli/
In a charming or attractive way that makes people like you.
She smiled winsomely at everyone she met, making friends easily.
Winsomely → It is formed from "winsome" (from Old English "wynn" meaning joy or pleasure, and "some" meaning characterized by) and the suffix "-ly" (meaning in a manner of). The word "winsomely" means in a manner characterized by joy or charm.
Think of someone who brings joy ('wynn') and is characterized by charm ('some') — that's how they act 'winsomely'.