cynically

Concise Oxford English Dictionary © 2008 Oxford University Press:
cynical/ˈsɪnɪkl/

▶adjective

• 1 believing that people are motivated purely by self-interest.

  ■ sceptical.

  ■ contemptuous; mocking.

• 2 (of behaviour or actions) proceeding from a concern only with one's own interests, regardless of accepted standards: a cynical foul.

– derivatives
cynically adverb.