Wildly means in an uncontrolled way, or to an extreme degree. Gesture wildly, wildly inaccurate, wildly popular.
The second sense has almost taken over: wildly is now mostly an intensifier, and it attaches to both praise and criticism — wildly successful and wildly wrong are equally common. The literal sense survives in describing movement.
1adverbwildlyIn an uncontrolled way, or to an extreme degree.
“The crowd cheered wildly as the winning goal went in.”
wildly is a degree.
Wild plus -ly, from Old English wilde, untamed.
Middle English
wildely
English, today
wildly
From Middle English wildely, wijldeli, wildeliche, equivalent to wild + -ly.
Etymology from Wiktionary, CC BY-SA