1. 
   Effortfulness
   In psychology effortfulness is the subjective experience of exertion in connection with an activity, but especially the mental aspects of an activity. In many applications, effortfulness is simply reported by a patient, client, or experimental subject. There has been some work establishing an assoc...
   Found op http://en.wikipedia.org/wiki/Effortfulness
   
   
2. 
   effortfulness
   [n] - the quality of requiring deliberate effort
   Found op http://www.webdictionary.co.uk/definition.php?query=effortfulness
   
   
3. 
   effortfulness
   noun the quality of requiring deliberate effort
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=effortfulness
   
   
4. 
   effortfulness
   1) Difficultness 2) Difficulty 3) The quality of requiring deliberate effort
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/effortfulness/1
   
   

Tip: double click on a word to show its meaning.