Winningly
/ˈwɪnɪŋli/
Definition 1 of 1
Pro Tip 1/3Positive Emotion
Use 'winningly' when describing actions that evoke happiness or affection. 
He acted so winningly that everyone liked him instantly.
Pro Tip 2/3Informal Settings
'Winningly' fits best in casual or creative contexts, not formal reports or articles. 
In her blog, she winningly recounts her travel adventures.
Pro Tip 3/3Subtle Flattery
It implies subtle persuasion or charm which isn't overly obvious. 
He complimented her work winningly, influencing her decision.