cyn ‧ ic /ˈsɪnɪk/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: cynicus , from Greek kynikos 'like a dog' , from kyon 'dog' ]
someone who is not willing to believe that people have good, honest, or sincere reasons for doing something:
Even hardened cynics believe the meeting is a step towards peace.
—cynicism /-sɪz ə m/ noun [uncountable]