sanguine
adjective /ˈsæŋɡwɪn/
  /ˈsæŋɡwɪn/
 (formal)- sanguine (about something) cheerful and confident about the future synonym optimistic
- They are less sanguine about the company's long-term prospects.
 - He tends to take a sanguine view of the problems involved.
 
Oxford Collocations DictionarySanguine is used with these nouns:- temperament
 
Word OriginMiddle English: from Old French sanguin(e) ‘blood red’, from Latin sanguineus ‘of blood’, from sanguis, sanguin- ‘blood’.