Search Result for "effortlessness": 
Wordnet 3.0

NOUN (1)

1. the quality of requiring little effort;
- Example: "such effortlessness is achieved only after hours of practice"



WordNet (r) 3.0 (2006):

effortlessness
    n 1: the quality of requiring little effort; "such
         effortlessness is achieved only after hours of practice"
         [ant: effortfulness]