challengingly
In a way or to an extent that challenges
Adverb
- In a way or to an extent that challenges
- […] Mr. Keltner is ready and eager to conduct all manner of experiments, whether they are whoopee-cushion silly or challengingly serious. - 2009 January 19, Janet Maslin, “Smiley Faces in Our Chromosomes”, in New York...
Origin
Etymology tree English challenging Middle English -ly English -ly English challengingly From challenging + -ly.