easiness

(n) a feeling of refreshing tranquility and an absence of tension or worry
- the easiness we feel when sleeping
relaxation,
(n) freedom from difficulty or hardship or effort
- he rose through the ranks with apparent ease
- they put it into containers for ease of transportation
- the very easiness of the deed held her back
ease, simpleness, simplicity,
(n) the quality of being easy in behavior or style
- there was an easiness between them
- a natural easiness of manner

relaxation ease simpleness simplicity

difficultness difficulty