ease
Word family
Synonym discussion
Sense: noun/1
These four words all describe a lack of difficulty, but they differ in scope and typical use. 'Ease' (noun/1) is the broadest and most common — it describes the general experience of doing something without effort ('She passed the test with ease'). 'Simplicity' focuses on the inherent quality of being simple or uncomplicated, rather than the experience of the person doing the task ('The simplicity of the design made it popular'). 'Effortlessness' emphasizes the absence of strain and is often used about graceful or natural performance, such as an athlete making a difficult move look easy. 'Facility' is more formal and less common in everyday speech; it implies natural aptitude or skill that makes a task feel easy ('He plays the piano with great facility'). In everyday conversation, 'ease' is the best choice; 'facility' sounds formal and is more common in written English.
Common collocations
Etymology
'Ease' entered English through Old French 'aise', meaning comfort or pleasure, from Latin 'adjacens' meaning 'lying near' or 'convenient'. The original idea was that something lying close at hand was easy to reach and therefore comfortable. Over time, the word split into the physical meaning (comfort, freedom from pain) and the action meaning (to make less severe). The military command 'at ease' dates from the 1800s.