sour brandish cutthroat scoundrel knave

sour

sour2 verb [intransitive and transitive]

1. if a relationship or someone’s attitude sours, or if something sours it, it becomes unfriendly or unfavourable:
   • An unhappy childhood has soured her view of life.
2. if milk sours, or if something sours it, it begins to have an unpleasant sharp taste

brandish

bran·dish /ˈbrændɪʃ/ verb [transitive] written

• to wave something around in a dangerous or threatening way, especially a weapon:
  • A man leapt out, brandishing a kitchen knife.

cutthroat

ˈcut-throat, cut·throat /ˈkʌtθrəʊt $-θroʊt / adjective [usually before noun]

• a cut-throat activity or business involves people competing with each other in an unpleasant way:
  • Cut-throat competition is keeping prices low.
  • the cut-throat world of advertising

scoundrel

scoun·drel /ˈskaʊndrəl/ noun [countable] old-fashioned

• a bad or dishonest man, especially someone who cheats or deceives other people

knave

knave /neɪv/ noun [countable]

1. British English the playing card with a value between the ten and queen SYNjack :
   • the knave of hearts
2. old-fashioned a dishonest boy or man

• knavish adjective:
  • cunning, knavish tricks
• knavishly adverb