From detached + -ly.
detachedly (comparative more detachedly, superlative most detachedly)
- In a detached manner.
2008 February 24, Roslyn Sulcas, “Unless You Have Another Word, Dance Will Do”, in New York Times[1]:In his second work, “Jérôme Bel,” four naked performers detachedly examine and manipulate their bodies, illuminated by a single light bulb, and eventually urinate onstage.