IPA: /ˈθrɪlɪŋli/
KK: /ˈθrɪlɪŋli/
In a way that causes excitement or strong feelings of pleasure.
The movie ended thrillingly, leaving the audience on the edge of their seats.
Thrillingly → It is formed from "thrill" (from Old English *þyrlian*, meaning to pierce or penetrate) and the suffix "-ingly" (meaning in a manner that). The word "thrillingly" means in a manner that causes excitement or intense pleasure, as if piercing through with excitement.
Think of something that 'pierces' you with excitement — that's what 'thrillingly' means when you experience something in an exciting way.