INSOUCIANT (adjective): a relaxed and happy, without worry or guilt: without worry, anxiety, or guilt–unconcerned.

Examples:
- Frank’s insouciant attitude toward money and the importance of saving will surely land him in financial trouble.
- The insouciant housekeeper didn’t notice that the dog had gotten out.
- Sometimes, Lisa admired Frank’s youthful insouciance, but other times she thought he was too cavalier.
- The insouciant way in which John managed his employees caused people to slack off and disregard their responsibilities.

Synonyms: breezy, carefree, ignorant, easygoing, blithe, nonchalant, careless

Antonyms: concerned, burdened, troubled, worried, anxious

SYNTHESIS (noun): the combination of ideas to form a theory or system :
1. result of combination: a new unified whole resulting from the combination of different ideas, influences, or objects
2. combining of various components into whole: the process of combining different ideas, influences, or objects into a new whole
3. chemistry formation of chemical compounds: the formation of compounds through one or more chemical reactions involving simpler substances

Examples:
- The synthesis of all the information we have gathered should provide us with a definitive theory.
- The synthesis of our various ideas created a truly unique marketing strategy for our client.
- Please synthesize the data in a concise report.
- The artist’s paintings are an interesting synthesis of abstraction and impressionism.

Synonyms: creation, combination, formation, mixture, compound, composition, union

Antonyms: separation, destruction