quality - (adj.): very good - used especially by people who are trying to sell something;  (n.): how good or bad something is; something that people may have as part of their character, for example courage or intelligence

• Synonyms (adj.): degree, goodness, condition, rank, type, sort
• Synonyms (noun) : characteristic, feature, description, trait
  
• Origin: 1290 Latin qualis meaning "of what sort"
• Example: Producing high-quality work is one of Gabby’s many good qualities.