effortless
	英 ['efətlɪs]
美['ɛfɚtləs]
	    
    英英释意
	
	- 1. requiring or apparently requiring no effort;
 - "the swallows glided in an effortless way through the busy air"
 
- 2. not showing effort or strain;
 - "a difficult feat performed with casual mastery"
 - "careless grace"