(ש"ע) קלות

n. lightness, ease, freedom from anxiety; indifference

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Noun
1. a state of refreshing tranquility
(synonym) relaxation
(hypernym) tranquillity, tranquility, quietness, quietude
(hyponym) languor, dreaminess
2. freedom from difficulty or hardship or effort; "he rose through the ranks with apparent ease"; "they put it into containers for ease of transportation"
(synonym) ease, simplicity
(hypernym) quality
(hyponym) effortlessness
(attribute) easy

Rzecz. łatwość

(n.)
The state or condition of being easy; freedom from distress; rest.
  

(n.)
Freedom from jolting, jerking, or straining.
  

(n.)
Freedom from emotion; compliance; disposition to yield without opposition; unconcernedness.
  

(n.)
Freedom from effort, constraint, or formality; -- said of style, manner, etc.
  

(n.)
Freedom from difficulty; ease; as the easiness of a task.