" lightheartedness "

1: carefree freedom from constraint;

  * e.g., " ... he approaches his medical duties with a lightheartedness that some patients find disturbing "

•  Synonyms : 

•  abandon,

•  abandonment,

•  ease,

•  naturalness,

•  spontaneity,

•  spontaneousness,

•  unconstraint,

•  uninhibitedness,

•  unrestraint

•  Antonyms : 

•  constraint,

•  restraint

1: having or showing freedom from worries or trouble;

  * e.g., " ... his lighthearted attitude in the face of danger was the source of some concern "

•  Synonyms : 

•  blithe,

•  carefree,

•  debonair,

•  devil-may-care,

•  gay,

•  happy-go-lucky,

•  insouciant,

•  lightsome,

•  slaphappy,

•  unconcerned

•  Antonyms : 

•  careworn